Protein Pumps (image) Iowa State University Share Print E-Mail Caption This ribbon diagram shows the structure of a protein pump known as YdaH. The pump removes certain antibiotics from bacteria, allowing them to resist medications. Credit Image courtesy of Edward Yu/Iowa State University 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.