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(+)
"psychosine--UDP galactosyltransferase"
"psychosine--udp galactosyltransferase"