The human, paired guide Poison (pgPoison) library targets 3` splice sites with paired guide RNAs for alternative exon removal (pgRNAs), induce skipping of "poison" cassette exons and corresponding upstream constitutive exons in ultraconserved regions. This compact library (targets 963 exons) allows direct comparison between loss of a constitutive coding exon (knockout) with loss of a poison exon.
Custom pools for follow-up screening or 10x Genomics Compatible CRISPR pools are also available by contacting your local sales representative.
In traditional CRISPR KO screens, Cas9 introduces double-strand breaks at locations specified by a gRNA. In this library, a CRISPR-Cas9-based method is used by expressing two sgRNAs to manipulate isoforms independent of gene inactivation. This approach enables rapid suppression of exon recognition in polyclonal settings to identify functional roles for individual exons.