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Comparison of mitochondrial proton l...

Duong, Cindy Ann.

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Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species./
作者:	Duong, Cindy Ann.
面頁冊數:	69 p.
附註:	Source: Masters Abstracts International, Volume: 43-06, page: 2069.
Contained By:	Masters Abstracts International43-06.
標題:	Biology, Animal Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1426305
ISBN:	9780542073434

Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species.
Duong, Cindy Ann.

Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species. - 69 p.

Source: Masters Abstracts International, Volume: 43-06, page: 2069.

Thesis (M.S.)--California State University, Fullerton, 2005.

Lamnid sharks can elevate the temperature of their aerobic locomotor muscle and viscera above water temperature because these tissues are perfused with counter-current heat exchangers. I proposed that these tissues are also specialized for thermogenesis by having a high rate of mitochondrial proton leak, an intrinsic property of the inner mitochondrial membrane whereby protons bypass ATP synthase as they return to the matrix and dissipate energy. Proton leak rates were measured in isolated red muscle and liver mitochondria of three shark species. I hypothesized that the endothermic shortfin mako would have a higher proton leak rate in both tissues than the ectothermic blue shark and leopard shark. Proton leak rates were higher in red muscle than in liver for all three species, but the rate per mg of mitochondrial protein did not differ significantly between endothermic and ectothermic sharks for either tissue. The results suggest that mitochondria from endothermic tissues of the mako shark are not specialized for thermogenesis.

ISBN: 9780542073434Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species.
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245 1 0 $a Comparison of mitochondrial proton leak rates in one endothermic and two ectothermic shark species.
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500 $a Source: Masters Abstracts International, Volume: 43-06, page: 2069.
500 $a Chair: Kathryn A. Dickson.
502 $a Thesis (M.S.)--California State University, Fullerton, 2005.
520 $a Lamnid sharks can elevate the temperature of their aerobic locomotor muscle and viscera above water temperature because these tissues are perfused with counter-current heat exchangers. I proposed that these tissues are also specialized for thermogenesis by having a high rate of mitochondrial proton leak, an intrinsic property of the inner mitochondrial membrane whereby protons bypass ATP synthase as they return to the matrix and dissipate energy. Proton leak rates were measured in isolated red muscle and liver mitochondria of three shark species. I hypothesized that the endothermic shortfin mako would have a higher proton leak rate in both tissues than the ectothermic blue shark and leopard shark. Proton leak rates were higher in red muscle than in liver for all three species, but the rate per mg of mitochondrial protein did not differ significantly between endothermic and ectothermic sharks for either tissue. The results suggest that mitochondria from endothermic tissues of the mako shark are not specialized for thermogenesis.
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