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Marker gene expression at HH16. Dorsal views of the caudal region of HH16 chicken embryos, rostral to the top. Expression patterns are similar to those at HH14; however, expression of MyoD, MyoG, Mrf4, Mef2c, Mef2d and the muscle structural genes begins earlier. Myh7 is now also expressed; elevated expression in the myotome of somite 10 is visible for Mef2a. Abbreviations and annotations as in Figs 1–3.
