带有非解离侧链的氨基酸（ ）处于兼性离子。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25860' and id < 2171229 and id<>'2171229' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25860' and id > 2171229 and id<>'2171229' order by id asc limit 5