Comment                variation 应该被用于描述 alleles, RFLP's,和其它自然发生的突变和多态性.或由于基因操作造成的变异（例如，位点直接突变）应用misc_difference来描述
                 

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Feature Key           3'clip

Definition            一个前体转录子的3'的最末端，在加工过程中被去除

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"                     
                      /evidence=<evidence_value>
                      /function="text"
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /note="text"
                      /partial
                      /standard_name="text"
                      /usedin=accnum:feature_label

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Feature Key           3'UTR

Definition          成熟转录子的3'端的区域，不能被翻译成蛋白  

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"                     
                      /evidence=<evidence_value>
                      /function="text"
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /note="text"
                      /partial
                      /standard_name="text"
                      /usedin=accnum:feature_label

--------------------------------------------------------------------------------

Feature Key           5'clip

Definition           前体转录子5'最末端区域，可在加工过程中去除

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"
                      /evidence=<evidence_value>                     
                      /function="text"
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /note="text"
                      /partial
                      /standard_name="text"
                      /usedin=accnum:feature_label

--------------------------------------------------------------------------------

Feature Key           5'UTR

Definition            在成熟转录子5'端区域，不能被翻译成蛋白

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"                     
                      /evidence=<evidence_value>
                      /function="text"
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /note="text"
                      /partial
                      /standard_name="text"
                      /usedin=accnum:feature_label

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Feature Key           -10_signal

Definition            Pribnow box; 一段在细菌转录单位起始位点前10bp的保守区域，可RNA聚合酶结合位点保守序列=TAtAaT[1,2,3,4]

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"                     
                      /evidence=<evidence_value>
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /partial
                      /note="text"
                      /standard_name="text"
                      /usedin=accnum:feature_label