a D-galactosylceramide + H2O => an N-acyl-sphingoid base + D-galactose
a d-galactosylceramide + h2o => an n-acyl-sphingoid base + d-galactose
a D-galactosylceramide + H2O => an N-acyl-sphingoid base + D-galactose
a d-galactosylceramide + h2o => an n-acyl-sphingoid base + d-galactose