KCNH2 and cancer: The anticancer effect of F7 fraction is probably due to the bioactive peptides found in the toxic Naja haje venom that may act by inhibiting specific ion channels related to HCC cancer—for example, blocking the voltage-gated shaker potassium channel that was found to mediate tumor cell proliferation by binding to HERG [39], a potassium channel protein that increases in concentration on the cell surface of cancer cells.