Immunocytochemical demonstration of insulin in the mesonephros and metanephros of the Brazilian opossum Didelphis albiventris).

The presence of insulin the brush border and apical pole of the cells lining the pouch opossum mesonephric and metanephric proximal tubules was demonstrated by immunofluorescence and immunoperoxidase techniques. Positive result for insulin was also observed in the tufts of capillaries of some metanephric corpuscles.