JEB -- Wu et al. 204 (24): 4271 Figure IG2

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Fig. 2. The relationship between the molecular activity of the sodium pump (Na⁺/K⁺-ATPase) and the average molecular area per lipid molecule (at a surface pressure of 30 mN m^–1) of (A) membrane lipids and (B) phospholipids from kidney and brain microsomes of rats (Rattus norvegicus) and cane toads (Bufo marinus). Each symbol represents the mean ± S.E.M. of six determinations. Each inset graph show the relationship for the 24 individual data points.