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  • Title: Human platelet actin. Evidence of beta and gamma forms and similarity of properties with sarcomeric actin.
    Author: Landon F, Huc C, Thomé F, Oriol C, Olomucki A.
    Journal: Eur J Biochem; 1977 Dec; 81(3):571-7. PubMed ID: 145944.
    Abstract:
    Human blood platelet actin was purified using 30% sucrose to extract actomyosin and potassium iodide to dissociate actomyosin and to depolymerize actin. Pure actin thus obtained resembles skeletic muscle actin in its polymerization properties, CD spectra and ability to activate myosin myosin Mg2+-ATPase. Isoelectric focusing gel analysis shows that human blood platelet actin exists in beta and gamma forms. The ratio of beta to gamma forms is of 5 in purified actin, in whole cell extract and in all the fractions studied.
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