Moreover, Fanconi anemia (FA) complementation group D2 (FANCD2) can directly connect to MCM2‐7 complex upon RS, thereby preventing pathological replication structure's accumulation124, 125 Naturally, FANCD2 has closely relationship with ATM, indicating ATM indirectly modulates the MCM proteins in answer to DNA RS and DNA damage. This evidence concerns the gene FANCD2 and Friedreich ataxia.