we have studied the distribution of the lysosomal sphingolipid hydrolases beta-glucosaminidase , beta-galactosaminidase , beta-galactosidase , alpha- and beta-glucosidases , and alpha-mannosidase in the bovine and human ocular tissues , choroid , cornea , lens , retina , and sclera using synthetic substrates in the form of the 4-methylumbelliferyl derivatives of the corresponding glycosides .
C0015392
ocular
C0035298
retina