Term Name:	UDP-galactose:glucosylceramide beta-1,4-galactosyltransferase activity
Synonyms:	LacCer synthase activity, lactosylceramide synthase activity, UDP-galactose glucosylceramide beta-1,4-galactosyltransferase activity
Definition:	Catalysis of the reaction: a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine + UDP-alpha-D-galactose = a beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-Cer(d18:1(4E)) + H+ + UDP.
Ontology:	GO: Molecular Function [GO:0008489]    QuickGO    AmiGO