SOD2 and cancer: Kuznetsov et al. found a synchronicity in mROS flashes, ΔΨm flickers, and [Ca2+]m transients in a photoactivated cancer cell line, and showed that ROS scavenging, by either Trolox or manganese O2−. dismutase (MnSOD) OX, prevents the ΔΨm flickers47.