ArcLight Illustration (image) Rice University Share Print E-Mail Caption An illustration shows the tether that links an ArcLight protein's fluorescent domain (green and gray) to its voltage-sensing domain (orange) in a neuron's membrane. Rice University scientists suggest in a new study that depolarization of the membrane moves the voltage-sensing domain, which in turn compresses the fluorescent protein and quenches it. Credit Lena Simine/Rice University Usage Restrictions For news reporting purposes only. 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.