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Fig. 4. Cryosections from 55 h.p.f. zebrafish demonstrate the distribution of nNOS
mRNA expression (blueish cells in A,C,E,F,H,I) in the brain, and its
relationship to the neuronal differentiation pattern represented by AT
immunoreactivity in adjacent sections (black in B,D,G). (A,B) Central
telencephalon (frontal view). (C,D) Thalamic and preoptic area (frontal view).
(E) The pretectum, posterior tuberculum (post. tub.), lateral hypothalamus,
the brainstem and secondary matrix on the border to the cerebellum (sagittal
view). (F,G) Sagittal view; (H) frontal view. (I) Weakly labelled nNOS
mRNA-expressing cells in the retina (arrowhead). Scale bars: in A, 50 µm
(A,B); in C, 50 µm (CE,I); in F, 50 µm (FH).