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Summary. Progression of marker gene expression from HH10-HH19/20, focusing on the onset of the most strongly expressed genes, as their onset can be determined most precisely. At all times, the expression of Tbx6, of pre-myogenic genes and of Myf5 overlaps. As development proceeds, the onset of markers associated with myogenic progression and terminal differentiation occurs earlier, indicating that the process accelerates in comparison with the progress of somite formation.
