“…54 Notably, the role of FMN/FAD and Mtr in the electron transfer process is critical. 35 Mtr serves as a porin-cytochrome complex, acting as an electron conduit, 60,61 whereas FMN/FAD acts as the flavoprotein's prosthetic group in complexes I and II, facilitating electron transfer from NADH to the ubiquinone pool. 62 The interaction between FMN and Mtr can be restricted by “redox switches”, that is, disulfide bonds present on the bacterial membrane which modulate the oxidative stress status.…”