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Fig. 2. Jun is dispensable for somitogenesis. (A,B) Expression of Jun is detected in the most recently formed somite. (A) Wild-type foetus with four somites; (B) wild-type foetus with seven somites. Arrowheads indicate Jun expression in the somite; arrow in B indicates midline expression of Jun. (C-L) Sox9 (C,D), Col2a1 (E,F), Uncx4.1 (G,H), Myod1 (I,J) and Pax1 (K,L) expression detected by whole-mount in situ hybridisation is comparable between Jun+/+ control (C,E,G,I,K) and Jun-/- (D,F,H,J,L) E12.5 embryos.