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. 2015 Apr 28;3(4):e12391. doi: 10.14814/phy2.12391

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© 2015 The Authors. Physiological Reports published by Wiley Periodicals, Inc. on behalf of the American Physiological Society and The Physiological Society.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Morphometric analysis of type I slow twitch myofiber density in WT, mdx, mdx:utrophin^+/− (het), and dko triceps muscles. Photomicrographs of (A) WT, (B) mdx, (C) mdx:utrophin^+/− (het) all at 3 months of age, and (D) dko muscles at 2 months immunostained for type I MyHC expression. Bar is 50 μm. (E) Morphometric analysis of density of type I myofibers. *Indicates significant difference from 3 month WT. ^#Indicates significant difference between the age-matched mdx and mdx:utrophin^+/− (het) muscle.