Gal-glycan-protein Keratan(1)-PG B3GNT1,2,3,4,7 add GlcNAc to form Keratan-PG Authored: Jassal, B, 2011-12-15 EC Number: 2.4.1.149 Edited: Jassal, B, 2011-12-15 Pubmed11042166 Pubmed11283017 Pubmed11821425 Pubmed15486459 Pubmed15560372 Pubmed15620693 Pubmed9417100 Reactome Database ID Release 432025724 Reactome, http://www.reactome.org ReactomeREACT_121143 Reviewed: D'Eustachio, P, 2012-03-28 The UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase family (B3GNTs) consists of 9 members in humans (Kolbinger et al, 1998; Shiraishi et al, 2001; Togayachi et al, 2001; Iwai et al, 2002; Huang et al, 2004; Ishida et al, 2005; Zheng et al, 2004). Members 1,2,3,4 and 7 can catalyse the addition of N-acetylglucosamine (GlcNAc) to the galactosyl residue of the sachharide chain in a beta-1,3 linkage to form a structure called Keratan-proteoglycan (PG).