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. 2009 Apr 22;96(8):3433–3442. doi: 10.1016/j.bpj.2009.01.010

Figure 4.

Figure 4

Measurement of hydrolytic activity in infrared samples at 5°C. The integrated 1246 cm−1 band is plotted against time. Selected spectra of this experiment are shown in Fig. 3. Full circles: Na+,K+-ATPase in the presence of 130 mM NaCl, 3 mM free Mg2+, and 20 mM KCl. Open circles: Control sample containing 4 mM vanadate.