a ganglioside GD1a + UDP-N-acetyl-alpha-D-galactosamine <=> a ganglioside GalNAc-GD1a + UDP + H(+)
a ganglioside gd1a + udp-n-acetyl-alpha-d-galactosamine <=> a ganglioside galnac-gd1a + udp + h(+)
a ganglioside GD1a + UDP-N-acetyl-alpha-D-galactosamine <=> a ganglioside GalNAc-GD1a + UDP + H(+)
a ganglioside gd1a + udp-n-acetyl-alpha-d-galactosamine <=> a ganglioside galnac-gd1a + udp + h(+)