Figure 1.
Specific binding of [3H]E2 in hepatic cytosol of the male rat. Aliquots (200 μl)of cytosol (5 mg protein/ml) precipitated with protamine sulfate were incubated with six different concentrations of [3H]E2 (0.15–3.0 nM) for 18 h at 0°C in the absence (total binding) and presence (nonspecific binding) of 100-fold excess of unlabeled E2. Specific binding was calculated by subtracting nonspecific binding from total binding. Each point is the mean ± SEM of triplicate determinations. The insert shows the Scatchard analysis of [3H]E2 specific binding.