Figure 2. A pair of synaptically connected hippocampal neurons (left panel, phase contrast micrograph).

One neuron is virally transfected with the α₂δ-2 protein and soluble eGFP (middle, fluorescence micrograph and right panel, overlayed phase contrast and fluorescent micrographs), the other neuron is an untransfected control neuron (arrow). Scale bar, 20 μm.