21.5 Steroid receptors have severalindependent domains Sin 3 Corepressor Rpd3 (Acetylase) (DNA-bindin Figure 21.20A repressor complex contains three components: a dNA binding subunit, a corepressor. and a histone deacetylase 请莘大Figure 21.20 A repressor complex contains three components: a DNA binding subunit, a corepressor, and a histone deacetylase. 21.5 Steroid receptors have several independent domains