alterations in the permeability of the glomerular basement membrane ( gbm ) towards native ferritin ( nf ) and iodinated albumin ( 125i-bsa ) following removal of the major glycosaminoglycans ( gags ) of the gbm , heparan sulfate ( hs ) and hyaluronic acid ( ha ) , were assessed utilizing the techniques of routine electron microscopy and autoradiography , respectively .
C0017973
glycosaminoglycans
C0019143
heparan sulfate