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  • Title: The influence of ethylenediaminetetraacetate on white skeletal muscle myosin.
    Author: Kasman K, Kakol I.
    Journal: Biochim Biophys Acta; 1977 Apr 25; 491(2):509-14. PubMed ID: 403954.
    Abstract:
    Myosin from rabbit white skeletal muscle was treated with 10 mM EDTA in 150 mM phosphate buffer. After precipitation of myosin by dialysis against a 14-fold volume of water, EDTA-treated myosin, myosin before treatment and the supernatant from the treatment of myosin with EDTA were examined on sodium dodecyl sulphate-polyacrylamide gels by electrophoresis. It has been found that the quantity of LC2 light chains diminished after treatment with EDTA, and the supernatant contained the LC2 light chains. Treatment of myosin with EDTA in the presence of Mg2+ does not change the stoichiometry of the LC2 light chain and the supernatant is free from LC2 light chains. The treatment of myosin with p-chloromercuri-benzoate leads to dissociation of the same amount of LC2 light chains. It is suggested that divalent cations and thiol groups are engaged in the attachment of LC2 light chain to the myosin molecule.
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