Fig. 7.
p75NTR-IR axon terminals commonly contact NPY-IR dendrites. A, A p75NTR-IR axon terminal (p75-T) contacts (curved arrow) a large NPY-IR dendrite (NPY-D) in the hilus. Several unlabeled terminals (UT) also contact (open curved arrows) this dendrite.B, A large NPY-IR dendrite (NPY-D) in the infragranular hilus is contacted by a p75NTR-IR axon terminal (p75-T) that forms a symmetric synapse (curved arrow). The NPY-labeled dendrite contains many gold–silver particles located at the plasmalemma (arrowheads) and is also contacted (open curved arrows) by an unlabeled terminal (UT) and an unlabeled mossy fiber terminal (mT). Scale bars: A, 1.0 μm; B, 0.5 μm.