Proteomic analysis of nitrated proteins in the skeletal muscle after physical exercise.

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We identified nitrotyptophan-containing proteins from adult rat skeletal muscle under physiological condition. The degree of typtophan nitration in the skeletal muscle were not changed by high intensity intermittent running. Thus, nitrotyptophan-containing proteins under physiological condition may not function as a scavenger of reactive oxygen and nitrogen species. In addition, the typtophan nitration of alpha-skeletal muscle actin, which is detected at approximately 60 kDa, and ERK that is involved in the signal transduction in cells were not changed by high intensity intermittent running.