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. 2017 Mar 23;17:86. doi: 10.1186/s12862-017-0902-6

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Representative stages of limb development used in this study. This study assembled the transcriptomes of four species (bat, mouse, opossum, and pig) from three stages of limb development, namely the ridge (a), bud (b), and paddle (c) stages. The embryos shown here are from Erophylla sezekorni (Buffy Flower Bat)