接受外来信息后，首先G蛋白的（ ）亚基激活邻近通道或酶。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29828' and id < 2420904 and id<>'2420904' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29828' and id > 2420904 and id<>'2420904' order by id asc limit 5