Simulation Movie (video) National Institutes of Natural Sciences Share Print E-Mail Loading video... Caption In the first half, Na+ (yellow sphere) is transported from inside to outside. In the last half, H+ (green sphere) is transported from outside to inside. Credit NINS/IMS Usage Restrictions None Share Print E-Mail 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.