a ganglioside Ac-O-9-GD3(d18:1(4E)) + UDP-N-acetyl-alpha-D-galactosamine <=> a ganglioside Ac-O-9-GD2(d18:1(4E)) + UDP + H(+)
a ganglioside ac-o-9-gd3(d18:1(4e)) + udp-n-acetyl-alpha-d-galactosamine <=> a ganglioside ac-o-9-gd2(d18:1(4e)) + udp + h(+)