“…Class 2 CRISPR-Cas systems, the best-studied system with single effector protein (e.g., Cas9, Cas12, or Cas13) for foreign DNA or RNA interference, are subdivided into Type II (Cas9), Type V (Cas12), and Type VI (Cas13). In the past few years, Class 2 CRISPR-Cas systems have revolutionized both basic and clinical researches, enabling more rapid, precise, and robust genome editing and modifications in cultured cells and animals [8][9][10][11][12][13][14][15][16][17] . However, there were only a few applications of Class 1 CRISPR-Cas (Type I, Type III and Type IV) system.…”