Fig. 7

Fig. 7 Zebrafish trk expression in the spinal cord, cranial ganglia, and retina. RNA probes labeled with [³⁵S]UTP specific for trk full-length transcripts were used to examine expression 6 days after fertilization, in sagittal sections for trkC1 (A-D) and the retina for the five trk probes (E-J) using in situ hybridization. (B and D) trkC1 dark-field photomicrographs. (A and C) phase photomicrographs of B and D, respectively. (F) trkA, (G) trkB1, (H) trkB2, (I) trkC1, and (J) trkC2 are dark-field photomicrographs. (E) Phase photomicrograph of F (trkA). The positions of retinal pigment epithelium (RPE), photoreceptors (PR), inner nuclear layer (INL), and ganglion cell layer (GCL) are indicated. The lens next to the GCL in F and H appears white but does not correspond to labeling. The scale bar is 50 μm.