ATP-Driven Oscillation of Glycerol-Extracted Insect Fibrillar Muscle: Mechano-Chemical Coupling
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چکیده
منابع مشابه
The Structure of Insect Fibrillar Flight Muscle
The fine structure of fibrillar flight muscle of the mature adult beetle Tenebrio molitor is described. Although the very high frequency of contraction of fibrillar muscle has previously been in part accounted for as the result of mechanical specialization of the wing-bearing segment rather than of a correspondingly high rate of motor impulse supply, the problem of the nature of the pathway by ...
متن کاملMechanical transients initiated by photolysis of caged ATP within fibers of insect fibrillar flight muscle
Kinetics of the cross-bridge cycle in insect fibrillar flight muscle have been measured using laser pulse photolysis of caged ATP and caged inorganic phosphate (Pi) to produce rapid step increases in the concentration of ATP and Pi within single glycerol-extracted fibers. Rapid photochemical liberation of 100 microM-1 mM ATP from caged ATP within a fiber caused relaxation in the absence of Ca2+...
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متن کاملAnions and the contraction of glycerol-extracted muscle fibers.
Glycerinated rabbit psoas fibers 5-19 days old were immersed in contracting solutions with and without varying concentrations of different sodium salts. Raising the pH of the solution in small steps identified a threshold pH above which the fibers rapidly developed maximum tension. In solutions with added chloride or acetate (O-O.15 M), threshold pH and maximum tension changed only slightly. In...
متن کاملEvidence from Insect Fibrillar Muscle about the Elementary Contractile Process
Bundles of myofibrils prepared from the dorsal longitudinal flight muscles of giant water bugs show oscillatory contractile activity in solutions of low ionic strength containing ATP and 10(-8)-10(-7)M Ca(2+). This is due to delay between changes of length and changes of tension under activating conditions. The peculiarities of insect fibrillar muscle which give rise to this behavior are (1) th...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1967
ISSN: 0003-1569
DOI: 10.1093/icb/7.3.457