isopropyl groups on the exterior. It is not actually locked into configuration because the size of the molecule makes it highly flexible, but the potassium ion gives some degree of coordination to the macromolecule. Applications Valinomycin was recently reported to be the most potent agent against severe acute respiratory-syndrome coronavirus (SARS-CoV) in infected Vero E6 cells. Valinomycin acts as a nonmetallic isoforming agent in potassium selective electrodes. This ionophore is used to study membrane vesicles, where it may be selectively applied by experimental design to reduce or eliminate the electrochemical gradient across a membrane. References External links Chemical Safety Regulations from New Jersey Department of Health. Health information on Scorecard. Valinomycin from Fermentek. Cyclic peptides Ionophores Depsipeptides