[Electron-histochemical identification and differentiation of the chemical composition of the supramembranous layer of kidney cells].

The supramembrane layer of cells in various parts of renal nephron in rats and dogs was determined with the help of colloid ferrum. The study of the chemical composition of the supramembrane layer of podocytes, epithelium of the distal tubules, thin segment, collecting tubules and endothelia of blood capillaries revealed in it the presence of carboxyl groups referring to sialic acid, the latter being bound with protein, not with lipids.