Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
Enzymes are macromolecular biological catalysts.
A fructan is a polymer of fructose molecules.
Hydrolysis is a term used for both an electro-chemical process and a biological one.
Levans are a group of fructans; polymers of fructose forming a non-structural carbohydrate, which in the case of levans can themselves link to form super-molecules comprising even hundreds of thousands.
Levanase (levan hydrolase, 2,6-beta-D-fructan fructanohydrolase) is an enzyme with systematic name (2->6)-beta-D-fructan fructanohydrolase.
This page lists enzymes by their classification in the International Union of Biochemistry and Molecular Biology's Enzyme Commission numbering system.