Reaction catalyzed by lactosylceramide alpha-2,3-sialyltransferase (2.4.3.9) show all sequences for 2.4.3.9
+
=
+
CMP-N-acetylneuraminate
+
beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
=
CMP
+
alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide