galactosylxylosylprotein 3-beta-galactosyltransferase; galactosyltransferase II; uridine diphosphogalactose-galactosylxylose galactosyltransferase; UDP-galactose:4-beta-D-galactosyl-O-beta-D-xylosylprotein 3-beta-D-galactosyltransferase; UDP-alpha-D • • •