15.01.2015 Views

Sequencher 4.8 User Manual--PC - Bioinformatics and Biological ...

Sequencher 4.8 User Manual--PC - Bioinformatics and Biological ...

Sequencher 4.8 User Manual--PC - Bioinformatics and Biological ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

28. Appendix - Feature Keys <strong>and</strong><br />

Qualifiers<br />

GenBank Feature tables<br />

GenBank Feature Tables provide a way of describing <strong>and</strong> locating features in a DNA<br />

sequence using internationally agreed-upon layout <strong>and</strong> vocabulary. Although these tables<br />

look complex, all tables are comprised of three basic elements which are described in the<br />

table below.<br />

Element<br />

Feature Key<br />

Location<br />

Qualifier<br />

Description<br />

A single word or abbreviation which<br />

indicates a functional grouping<br />

The instruction for where to find the<br />

feature in the sequence<br />

Additional information about the<br />

feature<br />

Feature tables may look simple or complex depending on the number of annotations in<br />

the table. The following figure shows a typical entry.<br />

Figure 27-1 A simple feature table entry<br />

Key Location/Qualifiers<br />

source 1..1509<br />

/organism=”Mus musculus”<br />

/strain=”CD1”<br />

In the example above, the feature key is “source” <strong>and</strong> the location is represented by a<br />

range “1…1509”. A location can be a single base, a range of bases, a single base within a<br />

range etc. The qualifier, which can be free text, controlled vocabulary, citation or<br />

SEQUENCHER <strong>4.8</strong> <strong>User</strong> <strong>Manual</strong> for Windows © 1991 - 2007 Gene Codes Corporation, Inc. All rights reserved.<br />

215

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!