Fig. 6.

Electron micrographs of serial sections through anti-α7 nAChR labeled synaptic contacts in CA1 stratum radiatum.A–I, Some synaptic contacts show persistent labeling at synaptic membranes throughout all serial sections (A–C,D–F, arrowheads), whereas others lack synaptic labeling in at least one of the sections (G–I). Labeling is found at presynaptic vesicles (double arrowheads) and at vesicular structures in the postsynaptic cytoplasm (arrows). b, Presynaptic boutons;s, postsynaptic spines. Scale bar:A–I, 250 nm.