在蛋白质分子中，下列哪种氨基酸没有遗传密码子

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32328' and id < 2570486 and id<>'2570486' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32328' and id > 2570486 and id<>'2570486' order by id asc limit 5