[Immunochemical analysis of lectin receptors in the structure of trophoblastic beta 1-glycoprotein and pregnancy-associated alpha 2-glycoprotein].

Trophoblastic beta-glycoprotein (TBG), pregnancy-associated alpha 2-glycoprotein (AGP) and alpha-fetoprotein (AFP) bind to concanavalin A, phytohemagglutinin P and pea lectin. Lentil lectin interacts with TBG only, whereas peanut lectin and castor bean lectin are characterized by affinity to AGP. Hence, TBG, AGP and AFP contain the following carbohydrate components: alpha-D-mannose, alpha-D-glucose, N-acetyl-D-glucosamine and N-acetyl-D-galactosamine. In addition, AGP contains beta-D-galactose.