PAC (IMAGE) Van Andel Research Institute Caption Cryo-EM images of proton-activated chloride channel (PAC) Credit Courtesy of Dr. Wei Lü, Van Andel Institute Usage Restrictions Please use attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.