title: Partial purification and characterization of chorionic gonadotrophin in plasma and in culture medium of trophoblast cells from the marmoset monkey (Callithrix jacchus).
abstract: A biologically active gonadotrophin has been purified from the media of long-term cultures of trophoblast cells of the common marmoset monkey by a combination of precipitation and chromatography. Marmoset chorionic gonadotrophin (CG) is a glycoprotein which binds Concanavalin A and wheat germ agglutinin. The protein purified from culture media exists as several isoelectric species with pI in the range pH 3.5-4.5. On gel filtration it eluted with an apparent molecular weight of 68-72,000 but on PAGE migrated as if it was 58-65,000. A glycoprotein with similar characteristics has been recovered from plasma samples of pregnant marmosets. Biological activity of partly purified CG from media, as determined by a mouse testicular cell bioassay, was 1-3 i.u./mg protein.
mesh_terms: D000818:Animals; D002144:Callithrix / Q000196:embryology / Q000378:metabolism*; D002143:Callitrichinae / Q000378:metabolism*; D002478:Cells, Cultured; D006063:Chorionic Gonadotropin / Q000097:blood / Q000302:isolation & purification*; D002853:Chromatography, Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D007525:Isoelectric Focusing; D011247:Pregnancy; D014327:Trophoblasts / Q000032:analysis*
chemical_list: D006063:Chorionic Gonadotropin