Genomic editing of RFP deletion was performed using wild type RFP sequence (oligo donor), and verified gRNA plasmid. The gRNA sequence was designed based on NGG PAM sequence, and cloned in the xCas9 (Cat#GE100078) or SpCas9 (Cat#GE100002) vector. The parent cell used for the gene editing contains a RFP expression cassette which has a big deletion in the coding sequence. 0.5ug of gRNA plasmid and 0.5ug RFP repairing oligo were co-transfected in the RFP negative parent cells. 10 days after transfection, RFP fluorescence can be observed (Left panel) in both xCas9 and SpCas9 transfected cells. However, xCas9 (Top) seems to have a higher editing efficiency than SpCas9 (bottom).