Protein Similarity Search
PSI-BLAST allows users to construct and perform a NCBI BLAST search with a custom, position-specific, scoring matrix which can help find distant evolutionary relationships. Users can specify pattern files to restrict search results using the PHI-BLAST functionality under 'more options'.
A new, more accurate, search tool combining optimal searching with iterative profile generation and over-extension error prevention is available using PSI-Search.
If you plan to use these services during a course please contact us.