Cholesterol, from the Ancient Greek chole- (bile) and stereos (solid) followed by the chemical suffix -ol for an alcohol, is an organic molecule.
Enzymes are macromolecular biological catalysts.
A gene is a locus (or region) of DNA that encodes a functional RNA or protein product, and is the molecular unit of heredity.
Nicotinamide adenine dinucleotide phosphate, abbreviated NADP or, in older notation, TPN (triphosphopyridine nucleotide), is a cofactor used in anabolic reactions, such as lipid and nucleic acid synthesis, which require NADPH as a reducing agent.
Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.
Smith–Lemli–Opitz syndrome (also SLOS, or 7-dehydrocholesterol reductase deficiency) is an inborn error of cholesterol synthesis.
7-Dehydrocholesterol is a zoosterol that functions in the serum as a cholesterol precursor, and is converted to vitamin D3 in the skin, therefore functioning as provitamin-D3.