ID   2.4.1.165
DE   N-acetylneuraminylgalactosylglucosylceramide beta-1,4-N-
DE   acetylgalactosaminyltransferase.
CA   a ganglioside GM3 (d18:1(4E)) + UDP-N-acetyl-alpha-D-galactosamine =
CA   a beta-D-GalNAc-(1->4)-alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-Glc-
CA   (1<->1)-Cer + H(+) + UDP.
CC   -!- Only substances containing sialic acid residues can act as acceptors;
CC       bovine fetuin is the best acceptor tested.
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