Molecular 'Velcro' (IMAGE) University of Oregon Caption Receptors are needed for synapses to become functional. Neuroligin (red) on the surface of the cell is tethered to neurotransmitter receptors (mauve) that reside in intracellular vesicles. This enables both synaptic components to move together to a site of synapse formation. Credit Courtesy of Philip Washbourne Usage Restrictions None 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.