Figure 9.

GABA-immunoreactive neurons contributing to type II synapses; postembedding technique. (A,C) Second out of two consecutive sections through the CBL (A) and corresponding schematic diagram of synaptic contacts (C). A GABA-immunoreactive neuron (GN) and an unlabeled neuron (NN1) are presynaptic (s, arrowhead) to a second unlabeled profile (NN2). (B,D) Second out of two consecutive sections through the CBL (B) and corresponding schematic diagram of synaptic contacts (D). A GABA-immunoreactive profile (GN) is postsynaptic to two unlabeled profiles (NN1, NN2) with presynaptic specializations (s, arrowheads). Scale bar in (A): 0.5 μm (applies to A–D).