Thursday, April 11, 2002

ScienceDaily Magazine -- UT Southwestern Researchers Find Protein Transforms Sedentary Muscles To Resemble Exercised Muscles UT Southwestern Researchers Find Protein Transforms Sedentary Muscles To Resemble Exercised Muscles
DALLAS – April 12, 2002 – A calcium-signaling protein transforms sedentary, easily fatigued muscles into energy-producing, fatigue-resistant muscles, UT Southwestern Medical Center at Dallas researchers report.
In a study published in today’s issue of Science, the researchers found that by genetically expressing the protein in skeletal muscles of laboratory mice, easily fatigued, or type II, muscle fibers were transformed into fatigue-resistant and mitochondria-rich, or energy-producing, type I muscle fibers, which resemble muscles that have been exercised.

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