analysis of bovine lens capsules and retinal microvessel basement membranes by cellulose acetate electrophoresis , together with treatment by specific enzymes or by nitrous acid , reveals that heparan sulfate is the only demonstrable glycosaminoglycan ( gag ) , consistent with the observations of most other investigators on basement membrane preparations from several different tissues .
C0019143
heparan sulfate
C0017973
glycosaminoglycan