an N-acylsphing-4-enine + UDP-alpha-D-galactose <=> N-acyl-D-galactosylsphing-4-enine + UDP + H(+)
an n-acylsphing-4-enine + udp-alpha-d-galactose <=> n-acyl-d-galactosylsphing-4-enine + udp + h(+)
an N-acylsphing-4-enine + UDP-alpha-D-galactose <=> N-acyl-D-galactosylsphing-4-enine + UDP + H(+)
an n-acylsphing-4-enine + udp-alpha-d-galactose <=> n-acyl-d-galactosylsphing-4-enine + udp + h(+)