Furthermore, transfection of a Flp-In T-Rex 293 stable cell line expressing a single copy of R387X(/T381T) luciferase gene with ABE8e plasmid led to 29% A-to-G conversion as shown by Sanger sequencing and restored luciferase activity by 51.47% ± 6.28% compared with wild-type luciferase (Figures 1E and 1F). Thus, the R387X(/T381T) mutation was selected to generate our luciferase ABE mouse model.