Localization of the arrestin transcripts in the retina of Pecten by in situ hybridization. A, The micrographs illustrate a portion of a whole-eye cryosection incubated with Arr12 antisense probe, viewed at two magnifications. B, Control section treated with the sense riboprobe. Only the antisense probe stained the tissue, the label being confined to the retina. However, both the ciliary and the rhabdomeric layers were decorated. L, Lens; DR, distal retina; PR, proximal retina.