CMP-N-acetyl-9-O-acetyl-beta-neuraminate + a ganglioside GM1 = a ganglioside Ac-O-9-GD1a + CMP + H(+)
cmp-n-acetyl-9-o-acetyl-beta-neuraminate + a ganglioside gm1 = a ganglioside ac-o-9-gd1a + cmp + h(+)
CMP-N-acetyl-9-O-acetyl-beta-neuraminate + a ganglioside GM1 = a ganglioside Ac-O-9-GD1a + CMP + H(+)
cmp-n-acetyl-9-o-acetyl-beta-neuraminate + a ganglioside gm1 = a ganglioside ac-o-9-gd1a + cmp + h(+)