... and presomitic mesoderm, respectively. In contrast, the expression of EphA4 ( Epha4 ), lunatic fringe or protocadherin , thought to be involved in segment border formation, was fairly normal in hypomorphic mutant embryos. These results suggest that the Mesp family of transcription factors is involved in both...

...Gerard L. Campbell; Peter M. J. Shelton ABSTRACT The confrontation of cells from the anterior region of an abdominal segment of Oncopeltus with those from the posterior region of the same or the adjacent segment results in the generation of a segment border. The behaviour of epidermal cells during...