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CB1 receptor immunoreactivity in the myenteric plexus of the pig ileum: (a) HuC/HuD immunoreactive neurons, (b) CB1 receptor immunoreactivity, (c) merge image. The open stars indicate HuC/HuD immunoreactive neurons co-expressing weak-to-moderate CB1 receptor immunoreactivity. The white stars indicate HuC/HuD immunoreactive neurons, which were CB1 negative. Scale bar: 50 µm.
