甾类激素介导的信号通路 A) EARLY PRIMARY RESPONSE TO STEROID HORMONE 1B) DELAYED SECONDARY RESPONSE TO STEROID HORMONE steroid hormone ne receptor secondary-response proteins steroid hormone-receptor complexes activate primary 晶8 response genes DNA DNA induced synthesis of a few different a pnmaryresponse proteins in the primary response a pnimary-response protein shuts off protein turns on pnmaryresponse secondary-response genes 反应阶段: ◆初级反应阶段:直接活化少 ◆次级反应:初级反应产物再活化 数特殊基因转录的,发生迅 其它基因产生延迟的放大作用 速甾类激素介导的信号通路 ‹ 初级反应阶段：直接活化少 数特殊基因转录的，发生迅 速； ‹次级反应：初级反应产物再活化 其它基因产生延迟的放大作用 反应阶段：