Tags: Enzyme.
In enzymology a galactosyldiacylglycerol alpha-23-sialyltransferase (EC 2.4.99.5) is an enzyme that catalyzes the chemical reactionCMP-N-acetylneuraminate + 12-diacyl-3-beta-D-galactosyl-sn-glycerol CMP + 12-diacyl-3-[3-(alpha-D-N-acetylneuraminyl)-beta-D-galactosyl]-sn- glycerolThus the two substrates of this enzyme are CMP-N-acetylneuraminate and 12-diacyl-3-beta-D-galactosyl-sn-glycerol whereas its 3 products are CMP [[12-diacyl-3-[3-(alpha-D-N-acetylneuraminyl)-beta-D-galactosyl]-sn-]] and glycerol.This enzyme belongs to the family of transferases specifically those glycosyltransferases that do not transfer hexosyl or pentosyl groups.