Optimal frequencies for magnetic acceleration of cytochrome oxidase and Na,K-ATPase reactions.
Low frequency magnetic fields increase the activity of the membrane enzymes, Na,K-ATPase and cytochrome oxidase, and the increased activity varies with frequency. Optimal frequencies for increases in the reaction rate constant of cytochrome oxidase and in the rate of splitting of ATP by Na,K-ATPase differ by an order of magnitude, and are in the ranges of the turnover numbers of the respective enzyme reactions. The two frequency dependence curves are similar in that the slope of the low frequency portion is about 10 times greater than the slope of the high frequency portion. The greater slope indicates greater ability to adjust quickly in the low frequency range, which may be significant for optimal biological control of activity.
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Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA. mb32@columbia.edu
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D000818:Animals; D003576:Electron Transport Complex IV / Q000378:metabolism*; D007668:Kidney / Q000201:enzymology; D007700:Kinetics; D008280:Magnetics; D011817:Rabbits; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism*
D003576:Electron Transport Complex IV; D000254:Sodium-Potassium-Exchanging ATPase