during 5 min of isotonic contraction of gastrocnemius muscles the mitochondrial content of total creatine [ sigma ( crp + cr ) ] decreases by 9.5 nmol/mg total protein whereas there is an increase in extramitochondrial total creatine by 12.3 nmol/mg total protein , indicating a net transfer of approximately 10 nmol total creatine/mg total protein/5 min across the mitochondrial inner membrane .
C0026237
mitochondrial
C0230840
mitochondrial inner membrane