Immunochemical identification of organ-specific human placentalαin2-globulin and its content in the amniotic fluid

An organ-specific human placental ₂, differing immunologically from previously known ₂ and ₁-globulins of pregnancy, -fetoprotein, placental lactogen, and chorionic gonadotropin, was identified by immunochemical analysis. The antigen thus discovered is present in large quantities in the placental tissue and amniotic fluid in the early stages of pregnancy, but at parturition its concentration is sharply reduced.Presented by Academician of the Academy of Medical Sciences of the USSR Yu. M. Lopukhin.Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 82, No. 7, pp. 803–804, July, 1976.