the concentration of unoccupied cytoplasmic binding sites ( 2 hr incubation at 2 degrees c ) for the synthetic androgen r1881 ( 17beta-hydroxy-17alpha-methyl-estra-4,9,11-trien-3-one ) and the synthetic progestin r5020 ( 17alpha,21-dimethyl-19-norpregna-4,9-diene-3,20-dione ) respectively was 10.7 +/- 1.4 and 14.3 +/- 3.2 fmoles per mg cytosol protein and the apparent steroid affinity respectively was 9.6 +/- 0.8 and 1.6 +/- 0.4 x 10 ( 8 ) m-1 .
C0010834
cytoplasmic
C1383501
cytosol