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Figure 1


Fig. 1. Expression of Pax7 in trout embryo. (A) Stage 16 embryo (approximately 40 somites). Frontal section through anterior tail: labelling is present in the anterior domain of the somite (arrow indicates the boundary between two somites). (B) Eyed-stage embryo. Transverse section through middle trunk: labelling is present in the dorsal domain of the neural tube and at the external surface of the somite. (C) Dual-colour in situ hybridisation for Pax7 (dark blue) and slow myosin light chain 1 (MyLC1; red) transcripts. Eyed-stage embryo. Transverse section through the middle trunk: Pax7-positive somitic external cells (arrow) are lateral to the slow muscle fibres. n, notochord; nt, neural tube; s, somite. Scale bar, 25 µm in A, 30 µm in B and 35 µm in C.