The structure of ABC transporter OpuA (IMAGE) University of Groningen Caption The structure of ABC transporter OpuA was determined in five conformational states. The conformation in which OpuA has transferred the substrate (red) from the receptor (blue) to the transport domain (green) is shown in the cartoon. The scaffold of the membrane is shown in yellow, and the motor unit that uses ATP to drive the transport is shown in orange. The cryo-EM model (using the same color codes) is shown below the cartoon, from two different angles. Credit Membrane Enzymology group, University of Groningen Usage Restrictions With credit 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.