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. 1998 Sep 21;142(6):1429–1446. doi: 10.1083/jcb.142.6.1429

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Association of GLUT4 and TfR is increased by insulin but decreased by contractions. Single fibers from insulin- or contraction-stimulated muscle were stained and observed as described in the legend for Fig. 10. Note the increased overlap of the two stainings in insulin-stimulated fibers and the decreased overlap in contraction-stimulated fibers compared with basal fibers (refer to Fig. 10), suggesting that GLUT4⁺/TfR⁻ elements are recruited by insulin and GLUT4⁺/TfR⁺ elements are recruited by contractions. Bars, 5 μm.