Figure 1.
Five examples of synapses in the Drosophila optic lobe (columns). Rows show three orthogonal views (xy, yz, xz slices) of each synapse. The presynaptic structure, referred to as a T-bar because of its shape, is centered in each image. Red dots mark segments containing postsynaptic densities (PSDs) that partner with the T-bar. Each image slice captures 1 μm2 of data.