GBA1 and Krabbe disease: Glucosylceramides and galactosylceramides are then hydrolyzed respectively by glucocerebrosidase (also named glucosylceramidase; the GBA gene encoding lysosomal glucocerebrosidase is associated to Gaucher disease) and galactosylceramidase (encoded by the GALC gene; that deficiency causes Krabbe disease) to regenerate ceramides.