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First published online April 26, 2005
Journal of Experimental Biology 208, 1593-1599 (2005)
Published by The Company of Biologists 2005
doi: 10.1242/jeb.01482

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Membranes and the setting of energy demand

A. J. Hulbert^1,2,* and P. L. Else^1,3

¹ Metabolic Research Centre, University of Wollongong, Wollongong, NSW 2522, Australia
² School of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
³ Department of Biomedical Sciences, University of Wollongong, Wollongong, NSW 2522, Australia

View larger version (21K): [in a new window]   Fig. 1. Changes in the resting metabolic rate (at 37°C) of the rat during it's life cycle. The value of the allometric exponent (b) is given for each section. Data are taken from Kleiber (1961).

View larger version (18K): [in a new window]   Fig. 2. (A) Allometric plot of the proton leak (at 170 mV and 37°C) in isolated liver mitochondria from mammal species differing in body mass (data are from table 1 in Porter et al., 1996). (B) Allometric plot of the activity of the Na+ pump (at 37°C and expressed as K+ uptake rate) in liver and kidney tissue slices from mammal species differing in body size. (Data from Couture and Hulbert, 1995a.) Values are means ± S.E.M. The respective allometric equations are shown in each figure.

View larger version (25K): [in a new window]   Fig. 3. Allometry of the fatty acyl composition in tissue phospholipids in mammals of different body mass. (A) Heart phospholipids, (B) skeletal muscle phospholipids, (C) liver phospholipids, (D) kidney phospholipids. Open circles represent the total percent of unsaturated acyl chains and filled circles the docosahexaenoic acid (DHA) content of the respective tissue phospholipids. All data are taken from Hulbert et al. (2002b). The allometric equation for the DHA data is shown in each panel.