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Abstract ▼ AI-Helper

Some biological activities showed as ATPase activity of myofibril, actomyosin and myosin extracted from chicken leg and pectoral skeletal muscle were investigated. The $Mg^{+2}$-ATPase activity at 0.05 M KCl were 0.82, 0.38 and 0.11 ${\mu}mole$ Pi/mg protein/min. in actomyosin,...

Some biological activities showed as ATPase activity of myofibril, actomyosin and myosin extracted from chicken leg and pectoral skeletal muscle were investigated. The $Mg^{+2}$-ATPase activity at 0.05 M KCl were 0.82, 0.38 and 0.11 ${\mu}mole$ Pi/mg protein/min. in actomyosin, myofibril and myosin from pectoral muscle while 0.71, 0.32 and 0.08 ${\mu}mole$ Pi/mg protein/min. in actomyosin, myofibril and myosin from leg muscle. EDTA-ATPase activity at 0.6M KCl were 0.80, 0.42 and 0.40 ${\mu}mole$ Pi/mg protein/min. in actomyosin, myofibril and myosin from pectoral muscle. In case of leg muscle, that activity was noted as 0.69, 0.33 and 0.28 ${\mu}mole$e Pi/mg protein/min in proteins. ATPase activity of myosin from leg and pectoral muscle were inhibited in 10% at a higher concentration of $Mg^{+2}$ than molar concentration of EDTA, and the ATPase activity was increased to 400% compared with control at $10^{-3}M$ of $Ca^{+2}$. Actomyosin from pectoral muscle was solubilized at 0.1 M KCl above and that from leg muscle was solubilized at 0.15 M KCl above. In case of myosin, pectoral muscle was solubilized at 0.25M KCI above and leg muscle was solubilized at 0.30M KCl above.