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Is there any study that showed composition of muscle fibers in human? 


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Yes, there have been several studies that have investigated the composition of muscle fibers in humans. One study used synchrotron radiation X-ray fluorescence to analyze the elemental composition of muscle fibers in biopsied human muscle tissues. The study found statistically significant differences in elemental compositions between different groups of muscle tissues, including dystrophies, myopathies, and reference samples . Another study developed a method based on muscle tissue RNA sequencing data to estimate the distribution of skeletal muscle fiber types. This method allowed for a larger number of individuals to be tested and showed a correlation between sequencing-based estimates and traditional methods of measuring fiber type distribution . Additionally, a study used mass spectrometry-based single-fiber proteomics to analyze the protein composition of different muscle fiber types. The study identified numerous fiber type-specific protein markers and revealed novel features of fiber type specificity .

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The provided paper discusses a study that developed a methodological procedure to characterize myofibers in human muscles based on multiple isoforms.
Yes, the present study investigated the genetic architecture of muscle fibers composition in humans using a genome-wide association study and polygenic score modeling.
Yes, the provided paper discusses the composition of muscle fibers in human skeletal muscle, specifically the three major fiber types: type 1, 2A, and 2X fibers.
Yes, the paper presents a method to estimate the distribution of skeletal muscle fiber types in humans using muscle tissue RNA sequencing data.
Yes, the study mentioned in the provided paper investigated the elemental composition of muscle fibers in human samples using synchrotron radiation X-ray fluorescence (SR-XRF) analysis.

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