Figure 1  .

In situ hybridisation with radiolabelled oligonucleotide probes for PACAP mRNA (A), NOS mRNA (B), VIP mRNA (C), and NPY mRNA (D) in the ciliary ganglion of the rat. A moderate number of nerve cell bodies expressing PACAP, albeit at a low level is seen (A; indicated by arrows). NOS mRNA is present in a moderate number of nerve cell bodies (B), while VIP and NPY are seen in greater number of nerve cell bodies (C, D); in this particular section labelled for VIP mRNA, all nerve bodies express VIP (C). Bar = 50 µm.