Figure 1 (IMAGE) Moscow Institute of Physics and Technology Caption Rv1819c protein transports a positively charged substrate, shown in pink, across the membrane into the cell Credit Albert Guskov/MIPT Usage Restrictions None 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.