(Alpha-N-Acetylneuraminyl-2,3-Beta-Galactosyl-1,3)-N-Acetyl-Galactosaminide 6-Alpha-Sialyltransferase Activity

ST6GALNAC Activity

Catalysis of the reaction: alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->3)-N-acetyl-D-galactosaminyl-R + CMP-N-acetyl-beta-neuraminate = alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->3)-[N-acetyl-alpha-neuraminyl-(2->6)]-N-acetyl-D-g.