label: beta-galactoside (CMP) alpha-2,3-sialyltransferase activity
label_lc: beta-galactoside (cmp) alpha-2,3-sialyltransferase activity
description: "Catalysis of the reaction: CMP-N-acetylneuraminate + beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl-R = CMP + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl-R."