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Perisynaptic Schwann cells at the neuromuscular junction. Frog skeletal muscle triple labeled with anti-neurofilament for axons (first panel, arrow) and synapsin I antibodies for nerve terminals (first panel, arrowhead), a monoclonal antibody, 2A12, for perisynaptic Schwann cells (second panel, the cell bodies are marked with *), and α-bungarotoxin for postsynaptic acetylcholine receptors (third panel). The merged image is shown in the fourth panel.
