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FIG. 6. Restriction of Xebl transcripts to the cervical spinal cord of the swimming tadpole. In silu hybridization (using same probes as Fig. 3) of longitudinal sections of stage 41 larvae. (a) Hybridized with sense RNA strand (control); (b, c) hybridized with antisense strand. (c) Higher magnification (80X) of spinal cord region of (b). Exposed for 40 days. R = rostral; br = brain; y = yolk-laden endoderm; SC = spinal cord; IV = 4th ventricle of brain; hbr = hindbrain; m = mesoderm; n = notochord; sm = somites; p = pharynx. |