Service Announcement

We will be carrying out essential maintenance on our service infrastructure on Tuesday 24th July between 7am to 5pm (BST). You may experience slow response from some services during this period. Apologies for any inconvenience caused. If you have any concerns, please contact us via support.

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.

STEP 1 - Select your database
STEP 2 - Enter your input sequence

a PROTEIN sequence in any supported format:

a file:

STEP 3 - Set your parameters
STEP 4 - Submit your job
(Tick this box if you want to be notified by email when the results are available)
If available, the title will be included in the subject of the notification email and can be used as a way to identify your analysis

If you plan to use these services during a course please contact us.