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Feature Key           rRNA

Definition            成熟的核糖体RNA；核糖体中RNA成分，可使氨基酸装配为蛋白

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

Comment               rRNA的大小应用/product qualifier来注明。它可用一个限定的核糖体RNA大小的列表来限定对它的描述

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Feature Key           S_region

 
Definition            免疫球蛋白重链的转换区。包括在同一个B细胞中导致不同的免疫球蛋白区表达的重链DNA的表达。

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

Parent Key            misc_signal

Organism scope        Eukaryotes

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Feature Key           satellite

Definition           许多的相关的短的基本的重复单位的串联重复；许多有一个碱基或其它特性与基因组的序列不同可从基因组DNA中分离出来

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

Molecule scope        DNA

Comment               用微卫星关键词来表明微卫星序列的区域；用重复单位来表明单独的微卫星重复单位

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Feature Key           scRNA

Definition            小细胞质RNA；任何小细胞质RNA分子存在于细胞基质或核（有时）中

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

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