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Fig. 2. Micrographs of sections from the smolt retina following in situ
hybridization with the UV or blue riboprobes derived from coho (coUV, coBL) or
rainbow trout (rtUV, rtBL). (A–D) Serial sections from the mid-ventral
retina show that the UV riboprobes (coUV in A and rtUV in C) do not label any
cones while the blue riboprobes (coBL in B and rtBL in D) label all single
cones, regardless of position in the square mosaic. (E,F) Serial sections from
the dorso-nasal periphery show multiple cells labelled by the UV riboprobes
(coUV in E and rtUV in F). Black arrowheads point to unlabelled single cones,
black arrows point to single cones labelled with the blue riboprobes, and
white arrows point to single cones labelled with the UV riboprobes; rpe,
retinal pigment epithelium. The riboprobe used in each section is specified at
the bottom of each panel. Other symbols and nomenclature as in
Fig. 1. Magnification bar (in
A) is 25 µm and relates to all panels.