ACKNOWLEDGEMENTS
The authors wish to thank the National Key Research and Development
Program of China (2018YFA0901301 and 2018YFC0406303), the National
Natural Science Foundation of China (21590812, 21607146, 51878638 and
51821006), and the International Partnership Program of Chinese Academy
of Sciences (GJHZ1845) for supporting
this work. The authors also thank Prof. Quan-Jiang Ji from Shanghai
Technological University, China, for the kind donation of the plasmid
pnCasPA-BEC.