为抗体重链或轻链可变区N端先导肽段编码的基因是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24540' and id < 2107962 and id<>'2107962' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24540' and id > 2107962 and id<>'2107962' order by id asc limit 5