title: Non-identical reaction of undissociated HCG and HCG-beta subunit with anti-HCGbeta serum.
abstract: Based on gel-filtration experiments, estimates of the content are given of undissociated human chorionic gonadotrophin (HCG) and HCG-beta subunit in HCG preparations. Radioimmunoassay of three HCG preparation using an antiserum against HCG-beta subunit showed that the slope of displacement curves was dependent on the ratio of HCG-beta subunit to undissociated HCG, the slope being steeper (negative) with increasing ratio. The implication of this observation on the choice of a suitable standard for HCG-beta radioimmunoassay is discussed.
mesh_terms: D006063:Chorionic Gonadotropin / Q000032:analysis* / Q000276:immunology; D006801:Humans; D007106:Immune Sera; D011863:Radioimmunoassay
chemical_list: D006063:Chorionic Gonadotropin; D007106:Immune Sera