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. Author manuscript; available in PMC: 2009 Oct 2.
Published in final edited form as: Arch Biochem Biophys. 2008 May 3;476(1):87–94. doi: 10.1016/j.abb.2008.04.035

Fig. 3.

Fig. 3

Steady state ATPase activity at various pH and Mg2+ concentrations. ATPase activity was followed by colorimetric measurement of Pi, in the presence of 5 μM Ca2+, 20 mM MES pH 6 (●), or MOPS, pH 7 (○), or Hepes pH 8 (▼), as described in Methods. The Mg2+ concentration was varied as indicated in the figure.