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Morphological and molecular analysis of skeletal muscle after injection of cardiotoxin. (A) Pop1-LacZ activity in heterozygous (+/−) and homozygous (−/−) mice at 5, 10, and 20 days after cardiotoxin injection. (B) RT-PCR analysis of myogenin, MyoD, Myf5, MRF4, Pop1, Pop1-LacZ, and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) in skeletal muscle tissue that was excised at the indicated times after cardiotoxin injection.
