Fig. 7. A mediolateral asynchrony originates oblique stripes in the PSM. (A-C) Dorsal view of PSM/newly formed somites of six-somite stage embryos hybridised with hairy1. Rostral is towards the top. The schematics depict the PSM stripe anterior progression. The transition between two horizontal stripes originates an oblique stripe in the PSM: the transition between a posterior to an anterior stripe implies the upregulation of the gene in the lateral domain of the anterior stripe concomitant with the downregulation in the lateral part of the posterior stripe. In a second phase, cells in the medial domain follow the same progression in their expression. Scale bar: 100 µm.
