Gal-Gal-Xyl-proteins Gal-Xyl-proteins A second galactose is added in the tetrasaccharide linker Authored: Jassal, B, 2011-11-01 Beta-1,3-galactosyltransferase 6 (B3GALT6) transfers a second galactose to the tetrasaccharide linker. Although it can act on substrates with a terminal beta-linked galactose residue, it prefers galactose-beta-1,4-xylose (Bai et al. 2001). B3GALT6 requires manganese as a cofactor (Zhou et al. 1999). EC Number: 2.4.1.134 Edited: Jassal, B, 2011-11-01 Pubmed11551958 Pubmed9892646 Reactome Database ID Release 431889978 Reactome, http://www.reactome.org ReactomeREACT_121213 Reviewed: D'Eustachio, P, 2012-03-28