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. 2022 Mar 3;21:64. doi: 10.1186/s12943-021-01487-4

Fig. 9.

Fig. 9

DNA editing platform CHyMErA is a combinatorial system. Cell lines harbouring nuclear SpCas9 and LbCas12a, as well as a hgRNA expression cassette, provide the basis of the CHyMErA system. Cas12a gRNAs are fused with Cas9 and expressed under a single U6 promoter in hgRNAs. This process is completed by Cas12a, which identifies the direct repeat sequence and cuts upstream of it to release functional Cas9 and Cas12 gRNAs that can be loaded onto their respective nucleases for directed combinatorial genome editing