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Suppl. Material 3. Rostral extension of occipital gene expression domains is conserved in osteichthyans. Head‐trunk interface of (A‐C) chicken embryos at HH20, (D,E) mouse embryos at E10.5 pc, (F,G) Xenopus
laevis embryos at st36 and (H,I) zebrafish embryos at 48 hpf; lateral views, rostral to the top (A‐E) or the
right (F‐I); the molecular markers used are indicated. The hypobranchial/hypoglossal muscle precursors
(HMP) express Lbx1 (A,D,F, arrows) or in the zebrafish, the paralogous gene lbx2 (H, arrows). The paired
type homeobox genes Alx4 and Prrx1 are expressed in the lateral mesoderm, with expression domains
anticipating the path of the HMP (B,C,E,G,I arrows). |
