XB-IMG-76212
Xenbase Image ID: 76212
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Fig. 1. Differential expression patterns of the bowline and ledgerline genes during Xenopus somitogenesis. (A,B) Expression patterns of bowline and ledgerline in the Xenopus PSM. Longitudi- nal serial sections of a stage 20 embryo were stained for bowline (A) and ledgerline (B), and the results are shown as a pseudocolor display. The white arrowheads in (A) and (B) represent the regions in which bowline and ledgerline, respectively, areexpressed. (C)Mergedimageof(A,B). The white arrowheads in (C) represent the regions in which the expression patterns of bowline and ledgerline overlap. The sec- tions are orientated so that the anterior part is to the left. (D,E) Whole-mount in situ hybridization for bowline (D) and ledgerline (E). The expression of bowline is restricted to the somitomeres. Interest- ingly, ledgerline is expressed in the newly formed somites, as well as in the somitomeres. The black bar indicates ledgerline expression in the newly formed somites. (F) Schematic diagram of the bowline and ledgerline expression patterns. Bowline is expressed in the anterior halves of the S-I to S-III somitomeres (left side). Ledgerline is expressed in the newly formed somites, in addition to the anterior halves of the S-0 to S-II somitomeres (right side). The dorsal view is shown, with
anterior being towards the top. The nomenclature used for the somitomeres follows that proposed earlier (Pourquie and Tam, 2001). Image published in: Hitachi K et al. (2009) Copyright © 2009. Reproduced with permission of the Publisher, University of the Basque Country Press.
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