Blood-group-substance endo-1,4-β-galactosidase (, ''endo-β-galactosidase'', ''blood-group-substance 1,4-β-D-galactanohydrolase'') is an

enzyme An enzyme () is a protein that acts as a biological catalyst by accelerating chemical reactions. The molecules upon which enzymes may act are called substrate (chemistry), substrates, and the enzyme converts the substrates into different mol ...

with

systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature. A semisystematic name or semitrivi ...

''blood-group-substance 4-β-D-galactanohydrolase''. It catalyses endohydrolysis of (1→4)-β-D-galactosidic linkages in

blood group A blood type (also known as a blood group) is based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycoli ...

A and B substances. It

hydrolyses Hydrolysis (; ) is any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution, elimination, and solvation reactions in which water is the nucleophile. Biological hydrolysis ...

the 1,4-β-D-galactosyl linkages adjacent to a 1,3-α-D-galactosyl or ''N''-acetylgalactosaminyl residues and a 1,2-α-D-fucosyl residue.

References

External links

* {{Portal bar, Biology, border=no EC 3.2.1