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On the enthalpy of binding of ADP to heavy meromyosin

✍ Scribed by Goodno, Charles C. ;Swenson, Charles A.

Publisher
Wiley (John Wiley & Sons)
Year
1975
Tongue
English
Weight
349 KB
Volume
3
Category
Article
ISSN
0091-7419

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✦ Synopsis

Abstract

The binding of ADP to heavy meromyosin has been studied by microcalorimetry. Minute amounts of myokinase interfere with binding measurements, but by selection of appropriate conditions, we can estimate that the value of the apparent Ξ”H~binding~ lies between βˆ’1.0 and βˆ’3.0 kcal per mole of ADP bound (0.3 M KCl, 2 mM MgCl~2~, 20 mM Tris, pH 8.00, 20Β°C). Values of Ξ”H~binding~ reported to date are an order of magnitude larger, and we suggest that these values are artifactual results due to myokinase contamination.

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