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

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

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When the To Reference by Name comm<strong>and</strong> is used, each contig created will contain a<br />

Reference Sequence <strong>and</strong> will also retain the numbering of the Reference Sequence.<br />

To use To Reference by Name, select the sequence fragments <strong>and</strong> Reference Sequence<br />

you want to assemble. Click the To Reference by Name button or go to the Contig<br />

menu <strong>and</strong> choose the Assemble Contigs comm<strong>and</strong> <strong>and</strong> then click onto Reference by<br />

Name from the submenu.<br />

Trim to Reference<br />

The Trim to Reference Sequence comm<strong>and</strong> is used to remove bases in a contig that<br />

flank the Reference Sequence on both the 5’ <strong>and</strong> 3’ ends (see Figure 7-3). To use this<br />

comm<strong>and</strong>, go to the Contig menu <strong>and</strong> choose Trim to Reference Sequence. This<br />

comm<strong>and</strong> is only available when you are in a contig that contains a Reference Sequence.<br />

Note: You cannot undo this action. If there are any sequences, which do not overlap the<br />

Reference Sequence they will be removed from the contig. <strong>Sequencher</strong> will warn you<br />

which fragments have been removed in a window, which you can print for your records.<br />

Figure 7-3 Contig with Reference Sequence flanked by overhanging sequence<br />

(before <strong>and</strong> after)<br />

Contig Editing with a Reference Sequence<br />

If you try to edit a Reference Sequence which has been assembled into a contig using<br />

either the st<strong>and</strong>ard Assemble Automatically or Assemble to Reference, a warning<br />

dialog will be displayed asking if you are sure this is what you want to do. You can<br />

proceed with the edit by clicking the Yes button. You can cancel the warning <strong>and</strong><br />

continue to edit by clicking the No button.<br />

The Reference Sequence is protected from any changes you make while you are editing<br />

in the consensus line. Therefore, if you delete gaps from the consensus this will not affect<br />

the Reference Sequence unless it also has gaps at the position of the deleted bases.<br />

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

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