Crass: The CRISPR Assembler

Crass is a program that searches through raw metagenomic reads for Clustered Regularly Interspersed Short Palindromic Repeats


Version 0.3.8 has been released with two bug fixes

Read more »


Crass has been published in Nucleic Acids Research

Read the paper here

The CRISPR File Format

Crass outputs a standard xml file that describes all of the CRISPRs that it discovers. This file format is open source and is being developed to facilitate the interchange of CRISPR data between different research groups.

Find out more »