Reaction catalyzed by beta-galactoside alpha-(2,6)-sialyltransferase (2.4.3.1), alpha-N-acetylgalactosaminide alpha-2,6-sialyltransferase (2.4.3.3)
+
=
+
CMP-N-acetylneuraminate
+
lactose
=
CMP
+
6'-sialyllactose