This module can perform very fast matches between the sequences to process and one or more screen sequences.
Any sequence containing a significant match is rejected.
An example of use for this module is to reject sequences prior to assembly that appear to be contaminated with E. coli. This is either the filename of a single sequence or the filename of a file of filenames, depending on the answer to the previous question. The sequence files must be in plain text format containing just the bases or white space. The maximum length of any individual screen sequence. Any fragment containing an exact match longer than this length will be rejected.