Control of Peptide Orientation by Electric Field (image) University of Sydney Share Print E-Mail Caption Control of peptide orientation by electric field. Charge separation on one end of the peptide creates a dipole moment (indicated by ellipses) that aligns with the electric field and rotates the entire molecule. When the peptide makes contact with the radical-functionalized surface it becomes irreversibly anchored in this orientation. Credit University of Sydney 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.