abnormal galactosylceramidase level absent galactosylceramidase level MP:0020266 MPheno.ontology absent D-galactosyl-N-acylsphingosine galactohydrolase protein absent beta-galactocerebrosidase protein absent beta-galactosylceramidase protein absent ceramide galactosidase protein absent cerebroside beta-galactosidase protein absent cerebroside galactosidase protein absent galactocerebrosidase protein absent galactocerebroside beta-galactosidase protein absent galactocerebroside galactosidase protein absent galactocerebroside-beta-D-galactosidase protein absent galactosylceramidase I protein absent galactosylceramide beta-galactosidase protein absent galactosylcerebrosidase protein absent galcerase protein absent lactosylceramidase I protein absent lactosylceramidase protein undetectable level of the enzyme that removes galactose from ceramide derivatives (galactocerebrosides).