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CRISPR-associated protein Cas5/CasD, subtype I-E/ECOLI CRISPR is a term for Clustered, Regularly Interspaced Short Palidromic Repeats. A number of protein families appear only in association with these repeats and are designated Cas (CRISPR-Associated) proteins. This family is part of the ECOLI subtype CRISPR/Cas locus, and now characterized as part of the CASCADE complex of that system. It shares a small N-terminal homology region with members of several other CRISPR/Cas subtypes, and we view the families that share this region as being Cas5.
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