Representative film autoradiographs at the levels of the SFO (A, C, E) andPVN (B, D, F) show patterns of IκBα mRNA hybridization in home-cage (HC) control animals (A, B), in animals killed at the end of 2 hr of immobilization (IM) stress (C, D), and in IM animals that received 50 mg/kg RU-486 30 min before stress (RU+IM; E, F). Scale bar, 0.5 cm.