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  • Title: [The comparative characteristics of myofibrillar protein transformation in muscles of different phenotypes].
    Author: Oganesian SS, Kaĭfadzhian MA, Tikunov BA.
    Journal: Zh Evol Biokhim Fiziol; 1990; 26(5):636-43. PubMed ID: 2151073.
    Abstract:
    Studies have been made on Mg2(+)-ATPase, Ca2(+)-sensitivity, superprecipitation and fractional composition of natural and desensitized actomyosin from myocardium, slow and fast skeletal muscles after physical training (swimming, gravitational loading) and after monthly readaptation. Physical overloading makes physicochemical properties and protein composition of actomyosin from the myocardium and slow skeletal muscles similar to those in fast skeletal ones. Changes in actomyosin from the myocardium and slow skeletal muscles are more profound, whereas the recovery of the initial properties during readaptation reveals high plasticity of muscles of these phenotypes. Changes in Ca regulation depend mainly on muscle phenotype. Different plasticity of muscles of various phenotypes during readaptation results from differences in the synthesis of protein components of myofibrils.
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