HYDROLASE, GLUCOCEREBROSIDASE, ACID-BETA-GLUCOSIDASE, N370S, GLUCOSYCEREMIDASE, TIM BARREL, ALTERNATIVE INITIATION, DISEASE MUTATION, DISULFIDE BOND, GAUCHER DISEASE, GLYCOPROTEIN, GLYCOSIDASE, ICHTHYOSIS, LIPID METABOLISM, LYSOSOME, MEMBRANE, SPHINGOLIPID METABOLISM 3KEH CRYSTAL STRUCTURE OF N370S GLUCOCEREBROSIDASE MUTANT AT PH 7.4