DAS Sequence Feature Retrieval

Jalview includes a client for retrieving sequences and their features via the Distributed Annotation System.

1. Open the Feature Settings panel by selecting "View -> Feature Settings..."
2. Click on the "DAS Settings" tabbed pane.
3. Select the sources to use for DAS feature retrieval, then click the "Fetch DAS Features" button.
   - Cancelling Feature Retrieval
     Press the Cancel Fetch button to immediately stop feature retrieval. This will not remove any features already added to the alignment, but will halt any outstanding DAS requests.The cancel fetch button is of particular use when one or more DAS annotation servers are not responding!

If your DAS source selection contains sources which use Uniprot accession ids, you will be asked whether Jalview should find Uniprot Accession ids for the given sequence names. It is important to realise that many DAS sources only use Uniprot accession ids, rather than Swissprot/Uniprot sequence names.
The database reference fetcher documentation describes how Jalview discovers what database references are appropriate for the sequences in the alignment.

- Note
  Please remember to save your alignment if either the start/end numbering, or the sequence IDs were updated during the ID retrieval process.

DAS support was introduced in Jalview Version 2.1.