an N-acyl-sphingoid base + UDP-alpha-D-galactose = a D-galactosylceramide + UDP + H(+)
an n-acyl-sphingoid base + udp-alpha-d-galactose = a d-galactosylceramide + udp + h(+)
an N-acyl-sphingoid base + UDP-alpha-D-galactose = a D-galactosylceramide + UDP + H(+)
an n-acyl-sphingoid base + udp-alpha-d-galactose = a d-galactosylceramide + udp + h(+)