Accession Number:

AD0260441

Title:

EFFECTS OF COLD STRESS ON MITOCHONDRIAL OXIDATIVE PHOSPHORYLATION

Descriptive Note:

Corporate Author:

TUFTS UNIV BOSTON MASS SCHOOL OF MEDICINE

Personal Author(s):

Report Date:

1961-04-01

Pagination or Media Count:

1.0

Abstract:

The PO ratio with succinate as substrate is the same for liver mitochondria from cold-fasted rats as it is for mitochondria from control rats. Glucose-hexokinase acceptor studies using either succinate or glutamate as substrate indicate that the oxidative phosphorylating system is about as tightly coupled in the liver mitochondria from cold-fasted rats as it is in those from control rats. These results were surprising since earlier work with liver homogenates indicated that the efficiency of oxidative phosphorylation is markedly reduced in the homogenate from cold-fasted rats. The possible reasons for these differences in results with homogenates on the one hand and mitochondria on the other are discussed. The use of mitochondrial activities as an index of the efficiency of oxidative phosphorylation in vivo is also discussed. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE