β-Glucocerebrosidase (also called acid β-glucosidase, D-glucosyl-N-acylsphingosine glucohydrolase, or GCase) is an enzyme with glucosylceramidase activity (EC3.2.1.45) that cleaves by hydrolysis the β-glycosidic linkage of the chemical glucocerebroside, an intermediate in glycolipid metabolism that is abundant in cell membranes (particularly skin cells).[5] It is localized in the lysosome, where it remains associated with the lysosomal membrane.[6] β-Glucocerebrosidase is 497 amino acids in length and has a molecular mass of 59,700 Da.[citation needed]