The BLAST against the CRISPR-Cas++ databases finds regions of local similarities between the submitted nucleotide sequence(s) and the list of DRs or (and) spacers of level 3 and level 4 CRISPRs. Multiple sequences can be submitted at one time.
The E-Value has been set at 0.1 but it can be modified. See NCBI Blast help page for more information on E-value.
It is used as follows:
The result is displayed in the next page, and it can also be recovered by mail if an adress has been provided.
A maximum of 200 alignments / submited sequence are displayed.
Clicking anywhere on the alignment or on the left side will open a page showing the corresponding CRISPR.