[Comparative immunochemical and physicochemical study of 2 alpha-glycoproteins from human kidney tumors].

Using immunochemical methods two "divergent" antigens were identified in tumors of kidney; these antigens were not found in normal kidney, but were observed in several other normal tissues. Both antigens were alpha-glycoproteins. Immunochemical analysis was carried out to find these proteins in extracts of normal tissues, in malignant tumors of kidney as well as in blood serum of patients with the kidney tumors. These proteins were-dissimilar in immunochemical properties and also in some physico-chemical characteristics; one of them was a thermostable protein and the other one was able to bind estrogens.