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Contents:
Volume 87, Issue 4; October, 2007.
[Index by Author] [Editorial Board]
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= article is free immediately upon publication
(all articles are free one year after publication)
Cover: Life and death: why do different species vary so greatly in their maximum possible life span? Why can humans live for up to 120 years yet rats live only 3 years? Why are birds so long living? What are the mechanisms that determine the distinctive maximum life span for each species? These questions have long puzzled biologists. Early answers were related to metabolic intensity of different species, yet it has been known for a while that the rate-of-living theory was not a complete explanation. In recent years it has become apparent that the fatty acid composition of membranes varies systematically among species and that when the different membrane composition is combined with the oxidative-stress theory, much of the variation in maximum life span among different animal species can be explained. See Hulbert, A. J., Reinald Pamplona, Rochelle Buffenstein, and W. A. Buttemer. Physiol Rev 87: 1175-1213, 2007.
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