Fig. 5.
[3H]25-HC binding to Insig-2 mutants. Each assay tube, in a total volume of 100 μl of buffer A, contained 400 nM His10–Insig-2–FLAG (wild-type or the indicated mutant version), 25 mM phosphocholine chloride, and the indicated concentration of [3H]25-HC (152 dpm/fmol). After incubation for 4 h at room temperature, specifically bound [3H]25-HC was measured as described in Fig. 2C. Each data point is the average of duplicate assays.