'Marathon mice' elucidate little-known muscle type

Researchers report in the January issue of the journal Cell Metabolism, published by Cell Press, the discovery of a genetic "switch" that drives the formation of a poorly understood type of muscle. Moreover, they found, animals whose muscles were full of the so-called IIX fibers were able to run farther and at higher work loads than normal mice could.

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<p><a href="http://www.physorg.com/news87045834.html">'Marathon mice' elucidate little-known muscle type</a></p> <p>Researchers report in the January issue of the journal <i>Cell Metabolism</i>, published by Cell Press, the discovery of a genetic "switch" that drives the formation of a poorly understood type of muscle. Moreover, they found, animals whose muscles were full of the so-called IIX fibers were able to run farther and at higher work loads than normal mice could.</p>