Mycotoxins & Cellular Efflux Mycotoxins and Cellular Efflux Pump Suppression One of the least discussed yet highly consequential effects of chronic mold exposure is its impact on cellular efflux transporters , particularly ATP-dependent pumps such as P-glycoprotein (P-gp) and other ABC transporters. These transporters are located in cell membranes throughout the body, including the gut lining, liver, blood–brain barrier, kidneys, and immune cells. Their role is not classical