This image shows a cultured hippocampal neuron that was nimmunolabeled for the vesicle SNARE protein synaptobrevin 2. The original image has been artificially colored with a gradient map for artistic effect. The transmembrane domain of synaptobrevin 2 influences the flow of neurotransmitter through synaptic fusion pores. For more information, see the article by Chiang et al. (pages 7179–7191).