[Immunochemical identification of a new embryonal antigen in ovarian tumor tissue].

A new embryonic antigen was found in the ovarian tumour tissues by immunodiffusion methods. This antigen consists of two components with a different electrophoretic mobility: a low peak migrates in the alha0-globulin zone, and a rapid one - in the prealbumin zone; it differs immunologically from alpha-fetoprot ein and cancer embrynoic antigen of the large intestine. This antigen was found in the fetus and newborn blood serum and also in the tissue extracts of ovarian tumours. No such antigen was revealed in the normal tissues of adults, or in the blood serum of donors and oncological patients.