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Fc receptor

Index Fc receptor

An Fc receptor is a protein found on the surface of certain cells – including, among others, B lymphocytes, follicular dendritic cells, natural killer cells, macrophages, neutrophils, eosinophils, basophils, human platelets, and mast cells – that contribute to the protective functions of the immune system. [1]

119 relations: Adaptive immune system, Agglutination (biology), Allergen, Allergy, Amino acid, Antibody, Antibody-dependent cell-mediated cytotoxicity, Antibody-dependent enhancement, Antigen, Antigen-presenting cell, Apoptosis, B cell, Basophil, C-type lectin, CD16, CD23, CD32, CD64 (biology), Cell membrane, Cell signaling, Chemokine, Cytokine, Cytoplasm, Cytotoxicity, Degranulation, Dendritic cell, Endocytosis, Endothelium, Enzyme, Eosinophil, Epithelium, Extracellular, Fc receptor-like molecule, FCAR, FCER1, Fcα/μR, Fetus, Flavivirus, Follicular dendritic cells, Fragment antigen-binding, Fragment crystallizable region, Granule (cell biology), Granulocyte, Granulocyte-macrophage colony-stimulating factor, Granzyme, Helminths, Hepatocyte, Histamine, Immune system, Immunoglobulin A, ..., Immunoglobulin E, Immunoglobulin G, Immunoglobulin M, Immunoglobulin superfamily, Immunoreceptor tyrosine-based activation motif, Immunoreceptor tyrosine-based inhibitory motif, Infant, Infection, Inflammation, Ingestion, Innate immune system, INPP5D, Integument, Interferon type II, Interleukin 13, Interleukin 3, Interleukin 4, Interleukin 5, Interleukin 6, Interleukin-1 family, International Immunology, Intracellular, Kupffer cell, Langerhans cell, Leukotriene, Ligand, Ligand (biochemistry), Lipid, Lymphocyte, Macrophage, Major basic protein, Mast cell, Mesangial cell, MHC class I, Microorganism, Milk, Molecule, Monocyte, Monomer, Natural killer cell, Neonatal Fc receptor, Neutrophil, Opsonin, Pathogen, Perforin, Peroxidase, Phagocyte, Phagocytosis, Phosphatase, Phosphate, Phosphorylation, Placenta, Platelet, Platelet-activating factor, Prostaglandin, Protein domain, Proteoglycan, PTPN6, Ras subfamily, Schistosoma, Serine protease, Signal transducing adaptor protein, Structure, Transmembrane protein, Tumor necrosis factor alpha, Tyrosine, Tyrosine kinase, Virus, White blood cell. Expand index (69 more) »

Adaptive immune system

The adaptive immune system, also known as the acquired immune system or, more rarely, as the specific immune system, is a subsystem of the overall immune system that is composed of highly specialized, systemic cells and processes that eliminate pathogens or prevent their growth.

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Agglutination (biology)

Agglutination is the clumping of particles.

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Allergen

An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body.

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Allergy

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.

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Amino acid

Amino acids are organic compounds containing amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid.

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Antibody

An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses.

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Antibody-dependent cell-mediated cytotoxicity

The antibody-dependent cell-mediated cytotoxicity (ADCC), also referred to as antibody-dependent cellular cytotoxicity, is a mechanism of cell-mediated immune defense whereby an effector cell of the immune system actively lyses a target cell, whose membrane-surface antigens have been bound by specific antibodies.

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Antibody-dependent enhancement

Antibody-dependent enhancement (ADE) occurs when non-neutralising antiviral proteins facilitate virus entry into host cells, leading to increased infectivity in the cells.

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Antigen

In immunology, an antigen is a molecule capable of inducing an immune response (to produce an antibody) in the host organism.

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Antigen-presenting cell

An antigen-presenting cell (APC) or accessory cell is a cell that displays antigen complexed with major histocompatibility complexes (MHCs) on their surfaces; this process is known as antigen presentation.

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Apoptosis

Apoptosis (from Ancient Greek ἀπόπτωσις "falling off") is a process of programmed cell death that occurs in multicellular organisms.

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B cell

B cells, also known as B lymphocytes, are a type of white blood cell of the lymphocyte subtype.

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Basophil

Basophils are a type of white blood cells.

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C-type lectin

A C-type lectin (CLEC) is a type of carbohydrate-binding protein domain known as a lectin.

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CD16

CD16, also known as FcγRIII, is a cluster of differentiation molecule found on the surface of natural killer cells, neutrophil polymorphonuclear leukocytes, monocytes and macrophages.

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CD23

CD23, also known as Fc epsilon RII, or FcεRII, is the "low-affinity" receptor for IgE, an antibody isotype involved in allergy and resistance to parasites, and is important in regulation of IgE levels.

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CD32

CD32 is a surface receptor protein and part of a large population of B cell co-receptors, which act to modulate signaling.

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CD64 (biology)

CD64 (Cluster of Differentiation 64) is a type of integral membrane glycoprotein known as an Fc receptor that binds monomeric IgG-type antibodies with high affinity.

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Cell membrane

The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates the interior of all cells from the outside environment (the extracellular space).

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Cell signaling

Cell signaling (cell signalling in British English) is part of any communication process that governs basic activities of cells and coordinates all cell actions.

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Chemokine

Chemokines (Greek -kinos, movement) are a family of small cytokines, or signaling proteins secreted by cells.

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Cytokine

Cytokines are a broad and loose category of small proteins (~5–20 kDa) that are important in cell signaling.

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Cytoplasm

In cell biology, the cytoplasm is the material within a living cell, excluding the cell nucleus.

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Cytotoxicity

Cytotoxicity is the quality of being toxic to cells.

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Degranulation

Degranulation is a cellular process that releases antimicrobial cytotoxic or other molecules from secretory vesicles called granules found inside some cells.

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Dendritic cell

Dendritic cells (DCs) are antigen-presenting cells (also known as accessory cells) of the mammalian immune system.

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Endocytosis

Endocytosis is a form of bulk transport in which a cell transports molecules (such as proteins) into the cell (endo- + cytosis) by engulfing them in an energy-using process.

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Endothelium

Endothelium refers to cells that line the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.

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Enzyme

Enzymes are macromolecular biological catalysts.

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Eosinophil

Eosinophils sometimes called eosinophiles or, less commonly, acidophils, are a variety of white blood cells and one of the immune system components responsible for combating multicellular parasites and certain infections in vertebrates. Along with mast cells and basophils, they also control mechanisms associated with allergy and asthma. They are granulocytes that develop during hematopoiesis in the bone marrow before migrating into blood, after which they are terminally differentiated and do not multiply. These cells are eosinophilic or "acid-loving" due to their large acidophilic cytoplasmic granules, which show their affinity for acids by their affinity to coal tar dyes: Normally transparent, it is this affinity that causes them to appear brick-red after staining with eosin, a red dye, using the Romanowsky method. The staining is concentrated in small granules within the cellular cytoplasm, which contain many chemical mediators, such as eosinophil peroxidase, ribonuclease (RNase), deoxyribonucleases (DNase), lipase, plasminogen, and major basic protein. These mediators are released by a process called degranulation following activation of the eosinophil, and are toxic to both parasite and host tissues. In normal individuals, eosinophils make up about 1–3% of white blood cells, and are about 12–17 micrometres in size with bilobed nuclei. While they are released into the bloodstream as neutrophils are, eosinophils reside in tissue They are found in the medulla and the junction between the cortex and medulla of the thymus, and, in the lower gastrointestinal tract, ovary, uterus, spleen, and lymph nodes, but not in the lung, skin, esophagus, or some other internal organs under normal conditions. The presence of eosinophils in these latter organs is associated with disease. For instance, patients with eosinophilic asthma have high levels of eosinophils that lead to inflammation and tissue damage, making it more difficult for patients to breathe. Eosinophils persist in the circulation for 8–12 hours, and can survive in tissue for an additional 8–12 days in the absence of stimulation. Pioneering work in the 1980s elucidated that eosinophils were unique granulocytes, having the capacity to survive for extended periods of time after their maturation as demonstrated by ex-vivo culture experiments.

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Epithelium

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue.

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Extracellular

In cell biology, molecular biology and related fields, the word extracellular (or sometimes extracellular space) means "outside the cell".

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Fc receptor-like molecule

Fc receptor-like molecules (FCRLs) are a class of proteins that resemble Fc receptors.

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FCAR

Fc fragment of IgA receptor (FCAR) is a human gene that codes for the transmembrane receptor FcαRI, also known as CD89 (Cluster of Differentiation 89).

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FCER1

The high-affinity IgE receptor, also known as FcεRI, or Fc epsilon RI, is the high-affinity receptor for the Fc region of immunoglobulin E (IgE), an antibody isotype involved in the allergy disorder and parasites immunity.

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Fcα/μR

Fcα/μR, also known as is CD351 (Cluster of Differentiation 351), is an Fc receptor that binds IgM with high affinity and IgA with a 10-fold lower affinity.

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Fetus

A fetus is a stage in the prenatal development of viviparous organisms.

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Flavivirus

Flavivirus is a genus of viruses in the family Flaviviridae.

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Follicular dendritic cells

Follicular dendritic cells (FDCs) are cells of the immune system found in primary and secondary lymph follicles of the B cell areas of the lymphoid tissue.

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Fragment antigen-binding

The antigen-binding (Fab) fragment is a region on an antibody that binds to antigens.

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Fragment crystallizable region

The fragment crystallizable region (Fc region) is the tail region of an antibody that interacts with cell surface receptors called Fc receptors and some proteins of the complement system.

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Granule (cell biology)

In cell biology, a granule is a small particle.

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Granulocyte

Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm.

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Granulocyte-macrophage colony-stimulating factor

Granulocyte-macrophage colony-stimulating factor (GM-CSF), also known as colony-stimulating factor 2 (CSF2), is a monomeric glycoprotein secreted by macrophages, T cells, mast cells, natural killer cells, endothelial cells and fibroblasts that functions as a cytokine.

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Granzyme

Granzymes are serine proteases that are released by cytoplasmic granules within cytotoxic T cells and natural killer (NK) cells.

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Helminths

Helminths, also commonly known as parasitic worms, are large multicellular parasites, which can generally be seen with the naked eye when they are mature.

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Hepatocyte

A hepatocyte is a cell of the main parenchymal tissue of the liver.

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Histamine

Histamine is an organic nitrogenous compound involved in local immune responses, as well as regulating physiological function in the gut and acting as a neurotransmitter for the brain, spinal cord, and uterus.

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Immune system

The immune system is a host defense system comprising many biological structures and processes within an organism that protects against disease.

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Immunoglobulin A

Immunoglobulin A (IgA, also referred to as sIgA in its secretory form) is an antibody that plays a crucial role in the immune function of mucous membranes.

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Immunoglobulin E

Immunoglobulin E (IgE) is a type of antibody (or immunoglobulin (Ig) "isotype") that has only been found in mammals.

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Immunoglobulin G

Immunoglobulin G (IgG) is a type of antibody.

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Immunoglobulin M

Immunoglobulin M (IgM) is one of several forms of antibody that are produced by vertebrates.

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Immunoglobulin superfamily

The immunoglobulin superfamily (IgSF) is a large protein superfamily of cell surface and soluble proteins that are involved in the recognition, binding, or adhesion processes of cells.

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Immunoreceptor tyrosine-based activation motif

An immunoreceptor tyrosine-based activation motif (ITAM) (in the antagonistic case ITIM, I for inhibition) is a conserved sequence of four amino acids that is repeated twice in the cytoplasmic tails of certain cell surface proteins of the immune system.

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Immunoreceptor tyrosine-based inhibitory motif

An immunoreceptor tyrosine-based inhibition motif (ITIM), is a conserved sequence of amino acids (S/I/V/LxYxxI/V/L) that is found in the cytoplasmic tails of many inhibitory receptors of the immune system.

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Infant

An infant (from the Latin word infans, meaning "unable to speak" or "speechless") is the more formal or specialised synonym for "baby", the very young offspring of a human.

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Infection

Infection is the invasion of an organism's body tissues by disease-causing agents, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce.

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Inflammation

Inflammation (from inflammatio) is part of the complex biological response of body tissues to harmful stimuli, such as pathogens, damaged cells, or irritants, and is a protective response involving immune cells, blood vessels, and molecular mediators.

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Ingestion

Ingestion is the consumption of a substance by an organism.

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Innate immune system

The innate immune system, also known as the non-specific immune system or in-born immunity system, is an important subsystem of the overall immune system that comprises the cells and mechanisms involved in the defense of the host from infection by other organisms.

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INPP5D

Phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase 1 is an enzyme that in humans is encoded by the INPP5D gene.

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Integument

In biology, integument is the natural covering of an organism or an organ, such as its skin, husk, shell, or rind.

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Interferon type II

A sole member makes up the type II interferons (IFNs) that is called IFN-γ (gamma).

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Interleukin 13

Interleukin 13 (IL-13) is a protein that in humans is encoded by the IL13 gene.

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Interleukin 3

Interleukin 3 (IL-3) is a protein that in humans is encoded by the IL3 gene.

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Interleukin 4

The interleukin 4 (IL4, IL-4) is a cytokine that induces differentiation of naive helper T cells (Th0 cells) to Th2 cells.

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Interleukin 5

Interleukin 5 (IL5) is an interleukin produced by type-2 T helper cells and mast cells.

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Interleukin 6

Interleukin 6 (IL-6) is an interleukin that acts as both a pro-inflammatory cytokine and an anti-inflammatory myokine.

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Interleukin-1 family

The Interleukin-1 family (IL-1 family) is a group of 11 cytokines that plays a central role in the regulation of immune and inflammatory responses to infections or sterile insults.

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International Immunology

International Immunology is a peer-reviewed medical journal published by Oxford University Press on behalf of the Japanese Society for Immunology, addressing studies in allergology and immunology.

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Intracellular

In cell biology, molecular biology and related fields, the word intracellular means "inside the cell".

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Kupffer cell

Kupffer cells, also known as stellate macrophages and Kupffer-Browicz cells, are specialized macrophages located in the liver, lining the walls of the sinusoids.

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Langerhans cell

Langerhans cells are dendritic cells (antigen-presenting immune cells) of the skin, and contain organelles called Birbeck granules.

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Leukotriene

Leukotrienes are a family of eicosanoid inflammatory mediators produced in leukocytes by the oxidation of arachidonic acid (AA) and the essential fatty acid eicosapentaenoic acid (EPA) by the enzyme arachidonate 5-lipoxygenase.

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Ligand

In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.

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Ligand (biochemistry)

In biochemistry and pharmacology, a ligand is a substance that forms a complex with a biomolecule to serve a biological purpose.

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Lipid

In biology and biochemistry, a lipid is a biomolecule that is soluble in nonpolar solvents.

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Lymphocyte

A lymphocyte is one of the subtypes of white blood cell in a vertebrate's immune system.

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Macrophage

Macrophages (big eaters, from Greek μακρός (makrós).

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Major basic protein

Proteoglycan 2, bone marrow (natural killer cell activator, eosinophil granule major basic protein), also known as PRG2, is a protein which in humans is encoded by the PRG2 gene.

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Mast cell

A mast cell (also known as a mastocyte or a labrocyte) is a type of white blood cell.

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Mesangial cell

Mesangial cells are specialised cells in the kidney that make up the mesangium of the glomerulus.

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MHC class I

MHC class I molecules are one of two primary classes of major histocompatibility complex (MHC) molecules (the other being MHC class II) and are found on the cell surface of all nucleated cells in the bodies of jawed vertebrates.

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Microorganism

A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or in a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from 6th century BC India and the 1st century BC book On Agriculture by Marcus Terentius Varro. Microbiology, the scientific study of microorganisms, began with their observation under the microscope in the 1670s by Antonie van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera and anthrax. Microorganisms include all unicellular organisms and so are extremely diverse. Of the three domains of life identified by Carl Woese, all of the Archaea and Bacteria are microorganisms. These were previously grouped together in the two domain system as Prokaryotes, the other being the eukaryotes. The third domain Eukaryota includes all multicellular organisms and many unicellular protists and protozoans. Some protists are related to animals and some to green plants. Many of the multicellular organisms are microscopic, namely micro-animals, some fungi and some algae, but these are not discussed here. They live in almost every habitat from the poles to the equator, deserts, geysers, rocks and the deep sea. Some are adapted to extremes such as very hot or very cold conditions, others to high pressure and a few such as Deinococcus radiodurans to high radiation environments. Microorganisms also make up the microbiota found in and on all multicellular organisms. A December 2017 report stated that 3.45 billion year old Australian rocks once contained microorganisms, the earliest direct evidence of life on Earth. Microbes are important in human culture and health in many ways, serving to ferment foods, treat sewage, produce fuel, enzymes and other bioactive compounds. They are essential tools in biology as model organisms and have been put to use in biological warfare and bioterrorism. They are a vital component of fertile soils. In the human body microorganisms make up the human microbiota including the essential gut flora. They are the pathogens responsible for many infectious diseases and as such are the target of hygiene measures.

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Milk

Milk is a white liquid produced by the mammary glands of mammals.

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Molecule

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

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Monocyte

Monocytes are a type of leukocyte, or white blood cell.

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Monomer

A monomer (mono-, "one" + -mer, "part") is a molecule that "can undergo polymerization thereby contributing constitutional units to the essential structure of a macromolecule".

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Natural killer cell

Natural killer cells or NK cells are a type of cytotoxic lymphocyte critical to the innate immune system.

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Neonatal Fc receptor

The neonatal Fc receptor (FcRn), also known as the Brambell receptor, is a protein that in humans is encoded by the FCGRT gene.

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Neutrophil

Neutrophils (also known as neutrocytes) are the most abundant type of granulocytes and the most abundant (40% to 70%) type of white blood cells in most mammals.

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Opsonin

An opsonin (from the Greek opsōneîn, to prepare for eating) is any molecule that enhances phagocytosis by marking an antigen for an immune response or marking dead cells for recycling (i.e., causes the phagocyte to "relish" the marked cell).

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Pathogen

In biology, a pathogen (πάθος pathos "suffering, passion" and -γενής -genēs "producer of") or a '''germ''' in the oldest and broadest sense is anything that can produce disease; the term came into use in the 1880s.

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Perforin

Perforin-1 is a protein that in humans is encoded by the PRF1 gene and the Prf1 gene in mice.

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Peroxidase

Peroxidases (EC number) are a large family of enzymes that typically catalyze a reaction of the form: For many of these enzymes the optimal substrate is hydrogen peroxide, but others are more active with organic hydroperoxides such as lipid peroxides.

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Phagocyte

Phagocytes are cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells.

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Phagocytosis

In cell biology, phagocytosis is the process by which a cell—often a phagocyte or a protist—engulfs a solid particle to form an internal compartment known as a phagosome.

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Phosphatase

A phosphatase is an enzyme that uses water to cleave a phosphoric acid monoester into a phosphate ion and an alcohol.

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Phosphate

A phosphate is chemical derivative of phosphoric acid.

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Phosphorylation

In chemistry, phosphorylation of a molecule is the attachment of a phosphoryl group.

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Placenta

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy.

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Platelet

Platelets, also called thrombocytes (from Greek θρόμβος, "clot" and κύτος, "cell"), are a component of blood whose function (along with the coagulation factors) is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.

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Platelet-activating factor

Platelet-activating factor, also known as PAF, PAF-acether or AGEPC (acetyl-glyceryl-ether-phosphorylcholine), is a potent phospholipid activator and mediator of many leukocyte functions, platelet aggregation and degranulation, inflammation, and anaphylaxis.

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Prostaglandin

The prostaglandins (PG) are a group of physiologically active lipid compounds having diverse hormone-like effects in animals.

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Protein domain

A protein domain is a conserved part of a given protein sequence and (tertiary) structure that can evolve, function, and exist independently of the rest of the protein chain.

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Proteoglycan

Proteoglycans are proteins that are heavily glycosylated.

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PTPN6

Tyrosine-protein phosphatase non-receptor type 6, also known as Src homology region 2 domain-containing phosphatase-1 (SHP-1), is an enzyme that in humans is encoded by the PTPN6 gene.

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Ras subfamily

Ras is a family of related proteins which is expressed in all animal cell lineages and organs.

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Schistosoma

Schistosoma is a genus of trematodes, commonly known as blood flukes.

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Serine protease

Serine proteases (or serine endopeptidases) are enzymes that cleave peptide bonds in proteins, in which serine serves as the nucleophilic amino acid at the (enzyme's) active site.

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Signal transducing adaptor protein

Signal transducing adaptor proteins are proteins that are accessory to main proteins in a signal transduction pathway.

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Structure

Structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized.

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Transmembrane protein

A transmembrane protein (TP) is a type of integral membrane protein that spans the entirety of the biological membrane to which it is permanently attached.

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Tumor necrosis factor alpha

Tumor necrosis factor (TNF, tumor necrosis factor alpha, TNFα, cachexin, or cachectin) is a cell signaling protein (cytokine) involved in systemic inflammation and is one of the cytokines that make up the acute phase reaction.

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Tyrosine

Tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins.

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Tyrosine kinase

A tyrosine kinase is an enzyme that can transfer a phosphate group from ATP to a protein in a cell.

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Virus

A virus is a small infectious agent that replicates only inside the living cells of other organisms.

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White blood cell

White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

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CD16/32, Fc Receptor, Fc gamma receptor, Fc receptors, Fc-alpha receptor, Fc-epsilon receptor, Fc-gamma receptor, Fc-receptor, FcRγ, IgE receptor, Receptors, fc.

References

[1] https://en.wikipedia.org/wiki/Fc_receptor

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