Using thist workflow you can select (or reject) only those sequence that match any pattern you input. To find sequences matching a pattern:

  1. In Read Sequence element specify a list of sequences you need to filter
  2. In Find Pattern element input you pattern(s) or file with pattern in any sequence or newline-delimited format.
  3. In Write Sequence element specify an output file

To find sequences that DO NOT match a pattern:

  1. Put "Rest" instead "hasPattern" in Filter element.
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If you haven't used the workflow samples in UGENE before, look at the "How to Use Sample Workflows" section of the documentation.