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Fig. 6 The expression of trkC1 and trkC2 in the brain, 24 h (D, J) and 27 h (C, F, I, K, and L) after fertilization. (A, B) Schematic drawings of trkC1 (A) and trkC2 (B) expression (blue) in the forebrain and midbrain shown in a lateral view. The plane of the sections in D and F is indicated. (C) A lateral view of the forebrain and midbrain of an embryo hybridized with trkC2. Rostral is to the left and dorsal is up (A?C). The sites of expression are the dorsal telencephalon (t), the nucleus of the tract of the postoptic commissure (ntpoc), anterior hypothalamus (h), and ventral midbrain (mb). (D) A frontal view of a trkC1-hybridized embryo. Dorsal is up. The positive cells labeled blue are located in the telencephalon (t) and the nucleus of the tract of the postoptic commissure (ntpoc). The positions of the eye (e) and the olfactory placode (op) are indicated. (E, F) Sections of a trkC2-hybridized embryo showing the positive cells in the nucleus of the tract of the postoptic commissure (ntpoc) (E), and ventral midbrain (mb) (F).
Reprinted from Developmental Biology, 195, Martin, S.C., Sandell, J.H., and Heinrich, G., Zebrafish TrkC1 and TrkC2 receptors define two different cell populations in the nervous system during the period of axonogenesis, 114-130, Copyright (1998) with permission from Elsevier. Full text @ Dev. Biol.