a beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide + H2O = a beta-D-glucosylceramide + D-galactose
a beta-d-galactosyl-(1->4)-beta-d-glucosyl-(1<->1)-ceramide + h2o = a beta-d-glucosylceramide + d-galactose