[Immunoelectrophoretic study of serum proteins of swine embryos]. / Immunoélektroforeticheskoe issledovanie belkov syvorotki krovi plodov svinei

During embryonic development, antigenic spectrum of serum proteins from porcine foetuses gradually become more complex, the number of antigens increasing from 4 in 1-month embryos to 12--13 in mature foetuses. Immunoelectrophoretic analysis of the serum reveals prealbumin, alpha- and beta-globulins. It was shown that with respect to its immunological properties, procine fetuin is not presented by a true stage-specific protein, since together with ESA-glogulin it contains antigens which are identical to those in the blood serum of adult animals. Immunoelectrophoresis did not reveal gamma-globulins in embryonic serum. It is suggested that porcine foetuses may synthesize the main proteins of the blood serum; however, final formation of antigenic spectrum is accomplished in postembryonic period.