Homogeneity of protein preparations determined by SDS-PAGE. Each lane contains 2 μg of purified protein, and the molecular masses (kDa) of the ladder are depicted. Lanes: L, molecular mass ladder; 1, FLRev-erbβMGC; 2, FLRev-erbβHGS; 3, FLRev-erbβ H568F; 4, FLRev-erbβ H568F/C384A; 5, MBP-NCoR1–540; 6, MBP; 7, THRβ1.