title: Specificity of antisera to sex steroids. I-- The effect of substitution and stereochemistry.
mesh_terms: D001665:Binding Sites; D003429:Cross Reactions; D004958:Estradiol / Q000031:analogs & derivatives / Q000276:immunology*; D008958:Models, Molecular; D008968:Molecular Conformation; D011374:Progesterone / Q000031:analogs & derivatives / Q000276:immunology*; D011863:Radioimmunoassay; D013329:Structure-Activity Relationship; D013739:Testosterone / Q000031:analogs & derivatives / Q000276:immunology*
chemical_list: D013739:Testosterone; D011374:Progesterone; D004958:Estradiol