alpha-galactosidase activity obsolete galactosylgalactosylglucosylceramidase activity true This term was obsoleted because its corresponding EC has been remapped to 'alpha-galactosidase activity'; GO:0004557. ceramidetrihexoside alpha-galactosidase activity molecular_function ceramidetrihexosidase activity trihexosylceramide alpha-galactosidase activity GO:0017041 trihexosyl ceramide galactosidase activity ceramide trihexosidase activity OBSOLETE. Catalysis of the reaction: D-galactosyl-D-galactosyl-D-glucosyl-N-acylsphingosine + H2O = lactosyl-N-acylsphingosine + D-galactose. D-galactosyl-D-galactosyl-D-glucosyl-N-acylsphingosine galactohydrolase activity