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  • Title: Affinity modification of creatine kinase and ATP-ADP translocase in heart mitochondria: determination of their molar stoichiometry.
    Author: Kuznetsov AV, Saks VA.
    Journal: Biochem Biophys Res Commun; 1986 Jan 14; 134(1):359-66. PubMed ID: 3004438.
    Abstract:
    Oxidized dialdehyde analogs of ADP or ATP (oADP and oATP) were shown to inhibit irreversibly adenine nucleotide translocator (T) and creatine kinase (CK) in heart mitochondria. Inactivation of T and CK was parallel with carboxyatractyloside - sensitive and (ADP + phosphocreatine) - sensitive incorporation of o[3H]ADP into mitochondria, respectively. o[3H]ADP incorporation sensitive to CAT or ADP+phosphocreatine was used to determine T and CK contents in mitochondria. T content in cardiac mitochondria from rat, rabbit, dog, and chicken was calculated to be 2.6 - 2.9 moles/mole cyt.aa3. The same value of T/cyt.aa3 ratio was found in liver mitochondria with lower cytochrome aa3 content. In all types of cardiac mitochondria CK content was found to be 2.4 - 2.6 moles/mole cyt.aa3. The data show that T and CK are present in molar ratio 1:1 in all types of cardiac mitochondria.
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