EM Syncam Proteins (IMAGE) University of California - San Diego Caption The new electron microscopy technique reveals the previously unknown locations of two neuronal proteins called SynCAM1 and SynCAM2. The first is an adhesion protein found at the synapse -- or communications link -- of neurons sending information. Its close relative, SynCAM2, is used by neurons receiving information. Neurons that send information are distinguishable because they contain synaptic vesicles, which are used to store neurotransmitters for communications use. In these images, the vesicles resemble small hollow circles. Credit UC San Diego School of Medicine 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.