ID   2.4.99.9
DE   Lactosylceramide alpha-2,3-sialyltransferase.
AN   Ganglioside GM3 synthase.
CA   CMP-N-acetylneuraminate + beta-D-galactosyl-(1->4)-beta-D-glucosyl-
CA   (1<->1)-ceramide = CMP + alpha-N-acetylneuraminyl-(2->3)-beta-D-
CA   galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide.
CC   -!- Lactose cannot act as acceptor.
DR   Q70D51, SIAT9_BOVIN;  Q9UNP4, SIAT9_HUMAN;  O88829, SIAT9_MOUSE;
DR   Q6KB55, SIAT9_PANTR;  Q68G12, SIAT9_RAT  ;
//