Rab1 Protein (image) Max-Planck-Gesellschaft Caption The Rab1 protein in its "normal" form (left) and following modification with adenosine monophosphate (AMP; right) using the bacterial enzyme DrrA. The green area shows the contact surface for proteins that convert Rab1 from its active to inactive form. Their attachment is prevented by the AMP residue. Credit Max Planck Institute of Molecular Physiology Usage Restrictions None 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.