A source of nonshivering thermogenesis in fur seal skeletal muscle

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Science  06 Apr 1979:
Vol. 204, Issue 4388, pp. 87-89
DOI: 10.1126/science.219477


The mitochondria from the subscapular muscle of naturally cold-stressed 10- to 15-year-old northern fur seals (Callorhinus ursinus) were loosely coupled upon isolation, whereas the mitochondria from the same muscle of warm-acclimated pups of the same age were tightly coupled. Thus, loose-coupled muscle mitochondria might provide an important vehicle for nonshivering thermogenesis in this species.