(A) Sanger sequencing validation of circMORC3, Flag-circMORC3, and Flag-circMORC3-ATG-mut overexpression plasmid capable of producing circular circMORC3. (B) qRT-PCR detection of the efficiency of circMORC3, Flag-circMORC3, and Flag-circMORC3-ATG-mut overexpression plasmids in producing circMORC3.