Dictyostelium amoeba (IMAGE) Johns Hopkins Medicine Caption A Dictyostelium amoeba, with red color indicating a reduction of negative electrical charge along the inner membrane where protrusions form to move the organism. Credit Tatsat Banerjee and Peter N Devreotes, Johns Hopkins Medicine Usage Restrictions None License Original 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.