title: Pregnancy specific beta-1 glycoprotein (SP1) in patients with trophoblastic disease: molecular heterogeneity and a "SP1 consuming factor".
abstract: The reactivity of sera from 19 patients with trophoblastic disease was analyzed in analytic immunoelectrophoresis using rabbit and human pregnancy specific beta-1 glycoprotein (SP1) antisera. Molecular heterogeneity of SP1 was demonstrated in crossed immunoelectrophoresis and a "SP1 consuming factors" was found in serum from a patient with choriocarcinoma. The "SP1 consuming factor" was precipitated by 1.65 M (NH4)2SO4. The results are discussed in relation to quantification of circulating SP1 patients with trophoblastic disease.
mesh_terms: D011232:Chemical Precipitation; D002822:Choriocarcinoma / Q000276:immunology; D005260:Female; D006801:Humans; D007122:Immunoelectrophoresis / Q000379:methods; D007123:Immunoelectrophoresis, Two-Dimensional; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000032:analysis*; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000032:analysis* / Q000276:immunology; D014328:Trophoblastic Neoplasms / Q000276:immunology*; D014594:Uterine Neoplasms / Q000276:immunology*
chemical_list: D011257:Pregnancy Proteins; D011268:Pregnancy-Specific beta 1-Glycoproteins