Perform a Smith-Waterman sequence similarity search using the ScanPS tool (see http://www.compbio.dundee.ac.uk/Software/Scanps/scanps.html). In the case the EBI's WSScanPS web service (see http://www.ebi.ac.uk/Tools/webservices/services/scanps) is used to run the tool. Note: the WSScanPS service used by this workflow was retired 27th January 2010. Equivalent functionality is available in the EBI's FASTA (REST or SOAP) and PSI-Search (REST or SOAP) services.