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Journal of Dental Research
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Myosin Heavy-chain Isoform Composition of Human Single Jaw-muscle Fibers

J.A.M. Korfage* and T.M.G.J. Van Eijden

Department of Functional Anatomy, Academic Center for Dentistry Amsterdam (ACTA), Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands;


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  		Figure 1. Immunohistochemical (A) and electrophoretic (B) characterization of single human jaw-muscle fibers. Consecutive fibers (1-5) were immunolabeled with antibody 332-3D4 (anti-MyHC-IIA and -IIX), 333-7H1 (anti-MyHC-IIA), and 219-1D1 (anti-MyHC-I). MyHC composition of fragments of the same single fibers was determined by gel electrophoresis. Only MyHCs are shown. Fiber types are: pure type I (2), pure type IIA (5), pure type IIX (4), and hybrid type IIA/IIX (1 and 3).

 

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  		Figure 2. Plots of the MyHC proportions within hybrid fiber types I/IIA (n = 14), I/IIX (n = 12), IIA/IIX (n = 62), and I/IIA/IIX (n = 12) of the temporalis and the digastric muscles. The median is indicated by the thick horizontal bar. The 75th and 25th percentiles are indicated by the top and bottom of the box; hybrid fibers that contain the highest or lowest percentage of a particular MyHC isoform are indicated by the thin horizontal bars.

 

Journal of Dental Research, Vol. 82, No. 6, 481-485 (2003)
DOI: 10.1177/154405910308200615
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