Comment              注意ＲＢＳ指核糖体结合位点

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Feature Key           RBS

Definition            核糖体结合位点

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

References            [1] Shine, J. and Dalgarno, L.  Proc Natl  Acad Sci USA
                          71, 1342-1346 (1974)
                      [2] Gold, L. et al.  Ann Rev Microb 35, 365-403 (1981)

Comment               在原核生物中为ＳＤ序列，定位在起始编码位点上游５－９个碱基处，一致序列＝ＧＧＡＧＧＴ［１，２］                 

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Feature Key           repeat_region

Definition           基因组中含有重复单位的区域 

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

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Feature Key           repeat_unit

Definition            单个重复单位

Optional qualifiers   /citation=[number]
                      /db_xref="<database>:<identifier>"                     
                      /evidence=<evidence_value>
                      /function="text"
                      /gene="text"
                      /label=feature_label
                      /map="text"
                      /note="text"
                      /partial
                      /rpt_family="text"
                      /rpt_type=<repeat_type>
                      /rpt_unit=<feature_label> or <base_range>
                      /usedin=accnum:feature_label

Comment              更好的利用是在repeat_region中注明/rpt_family和/rpt_type qualifiers,而不是在repeat_unitz中

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Feature Key           rep_origin

Definition            复制原点；核酸复制的起点

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

Comment              方向是有效值：向右，向左，或双向