Fig. 4 |. Structure-guided engineering of the AsCas12f gRNA.
a, Indel frequencies mediated by enAsCas12f with engineered AsCas12f gRNAs at HEXA and PDCD1 loci. The structures of engineered gRNAs are shown in Supplementary Fig. 14. b, Structure of sgRNA-v2. c, Time-course in vitro DNA cleavage using full-length sgRNA and sgRNA-v2. The assay was conducted using enAsCas12f at 37 °C. Data points were fitted to one-phase exponential association curves. Gel images are provided in Supplementary Fig. 16. d, Indel frequencies mediated by the full-length sgRNA and sgRNA-v2 in complex with enAsCas12f at denoted genomic loci in HEK293T cells. e, Box-and-whisker plot of indel frequencies mediated by the full-length sgRNA or sgRNA-v2 in complex with enAsCas12f. All data points (n = 8 target sites) were plotted, with the centerline showing the median and the whiskers showing the minimum to the maximum. The boundaries of the box indicate the first and third quantiles. P values were determined by two-tailed paired Student’s t-test. f, Relative abundance of full-length sgRNA and sgRNA-v2 targeting HEXA and PDCD1 loci in HEK293T cells. Two independent replicates were carried out in a, c, and d.