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Physiological structure of creatine. Adopted from Clarke et al. [41]. L-arginine: glycine amidinotransferase (AGAT); anidinoacetate N-methyltransferase (GAMT); phosphocreatine (PCr); cytosolic creatine kinase (Cyt. CK); electron transport chain (ETC); adenosine diphosphate (ADP); mitochondrial creatine kinase (mtCK); and adenosine triphosphate (ATP).
