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. 2015 Apr 11;6:10. doi: 10.1186/s13227-015-0004-8

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© Passamaneck et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Expression patterns of Tt.Limpet and Tt.Mef2. All images are oriented with anterior to the left. Panels (A-D) and (I-L) are lateral views. Panels (E, F) and (M, N) are blastoporal views. Panels (G, H) and (O, P) are ventral views. For detailed descriptions of expression patterns, see text. (A-H) Tt.Limpet is expressed in the apical ectoderm at the gastrula stages. Mesodermal expression is first observed in the early larva in irregular bands in the developing apical and mantle lobes. In the late larva, strong expression is observed in all but the most posterior region of the mesoderm. (I-P) Weak expression of Tt.Mef2 is observed in the apical ectoderm at the late gastrula stage. In the early larva, a strong continuous band of mesodermal expression flanks the anterior portion of the endoderm and extends laterally into the developing mantle lobe. In the late larva, strong expression is observed flanking the endoderm in the apical lobe and extending into the mantle lobe, including the chaetal sacs. Expression to Tt.Mef2 is also observed in the pedicle lobe mesoderm.