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Skeletal muscles require energy either at constant low (e.g., standing and posture) or immediate high rates (e.g., exercise). To fulfill these requirements, myocytes utilize the phosphocreatine (PCr)/creatine (Cr) system as a fast energy buffer and shuttle. We have generated mice lacking l-arginine:glycine amidino transferase (AGAT), the first enzyme of creatine biosynthesis. These AGAT−/− (d/d) mice...
l-Homoarginine (hArg) is an endogenous amino acid which has emerged as a novel biomarker for stroke and cardiovascular disease. Low circulating hArg levels are associated with increased mortality and vascular events, whereas recent data have revealed positive correlations between circulating hArg and metabolic vascular risk factors like obesity or blood glucose levels. However, it is unclear whether...
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