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Fig. 2. Extension of Kleiber's 3/4-power law for the metabolic rate of mammals to
over 27 orders of magnitude from individuals (blue circles) to uncoupled
mammalian cells, mitochondria and terminal oxidase molecules, CcO of the
respiratory complex, RC (red circles). Also shown are data for unicellular
organisms (green circles). In the region below the smallest mammal (the
shrew), scaling is predicted to extrapolate linearly to an isolated cell
in vitro, as shown by the dotted line. The 3/4-power re-emerges at
the cellular and intracellular levels. Figure taken from West et al.
(2002b) with permission.
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