Term Name:	galactosylxylosylprotein 3-beta-galactosyltransferase activity
Synonyms:	galactosyltransferase II activity, UDP-galactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase activity, UDPgalactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase activity, uridine diphosphogalactose-galactosylxylose galactosyltransferase activity
Definition:	Catalysis of the reaction: 4-beta-D-galactosyl-O-beta-D-xylosylprotein + UDP-galactose = 3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosylprotein + UDP.
Ontology:	GO: Molecular Function [GO:0047220]    QuickGO    AmiGO