sphing-4-enine + UDP-alpha-D-galactose <=> beta-D-galactosyl-(1<->1)-sphing-4-enine + UDP + H(+)
sphing-4-enine + udp-alpha-d-galactose <=> beta-d-galactosyl-(1<->1)-sphing-4-enine + udp + h(+)
sphing-4-enine + UDP-alpha-D-galactose <=> beta-D-galactosyl-(1<->1)-sphing-4-enine + UDP + H(+)
sphing-4-enine + udp-alpha-d-galactose <=> beta-d-galactosyl-(1<->1)-sphing-4-enine + udp + h(+)