Chan D W, Slaunwhite W R
J Clin Endocrinol Metab. 1977 May;44(5):983-5. doi: 10.1210/jcem-44-5-983.
R5020 (17,21-dimethyl-19-nor-4,9-pregnadiene-3,20-dione), a synthetic progestin, was tested for its binding to purified human transcortin, albumin and human serum. Scatchard analysis showed that R5020 bound relatively weakly to transcortin (Kass = 8 X 10(6)M-1); in 20% human serum or albumin greater than 90% was bound with low Kass and an indeterminate number of binding sites.
R5020(17,21 - 二甲基 - 19 - 去甲 - 4,9 - 孕二烯 - 3,20 - 二酮),一种合成孕激素,被测试其与纯化的人皮质类固醇结合球蛋白、白蛋白及人血清的结合情况。斯卡查德分析表明,R5020与皮质类固醇结合球蛋白的结合相对较弱(结合常数Kass = 8×10⁶M⁻¹);在20%的人血清或白蛋白中,超过90%以低结合常数和不确定数量的结合位点结合。