sialyltransferase activity alpha-N-acetylneuraminyl-2,3-beta-galactosyl-1,3-N-acetyl-galactosaminide 6-alpha-sialyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 RHEA:53896 (alpha-N-acetylneuraminyl-2,3-beta-galactosyl-1,3)-N-acetylgalactosaminide alpha-2,6-sialyltransferase activity GO:0047290 molecular_function RHEA:56088 alpha-N-acetylneuraminyl-2,3-beta-galactosyl-1,3-N-acetyl-galactosaminide alpha-2,6-sialyltransferase activity sialyltransferase activity RHEA:41968 EC:2.4.3.7 KEGG_REACTION:R04635 RHEA:77679 NeuAc-alpha-2,3-Gal-beta-1,3-GalNAc-alpha-2,6-sialyltransferase activity RHEA:48316 MetaCyc:2.4.99.7-RXN RHEA:65288 Reactome:R-HSA-981809 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-galactosaminyl-R + CMP. cytidine monophosphoacetylneuraminate-(alpha-N-acetylneuraminyl-2,3-beta-galactosyl-1,3)-N-acetylgalactosaminide-alpha-2,6-sialyltransferase activity ST6GALNAC activity RHEA:65280 RHEA:65284