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. 2010 Dec 29;5(12):e15741. doi: 10.1371/journal.pone.0015741

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Friedli et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Optical projection tomography (OPT) images of selected LacZ stained embryos. One representative embryo for each orthologous mouse human and chicken enhancer was selected. Arrowheads highlight expression in the trigeminal ganglion. Top: sagittal sections. Bottom: frontal sections. (Right) In situ hybridisations for Olig1 and Olig2 genes.