Cr. Worthington et Gf. Elliott, THE STEP-SIZE DISTANCE IN MUSCLE-CONTRACTION - PROPERTIES AND ESTIMATES, International journal of biological macromolecules, 19(4), 1996, pp. 287-294
The step-size distance in muscle contraction is obtained using the ste
p-size distance equation z = u/n, where z is the step-size distance, u
is the actin filament velocity and n is the ATPase rate of splitting.
In a previous study a step-size distance of about 17 Angstrom at no l
oad was determined for intact frog muscle. Some properties of the step
-size distance equation are described. We have now made estimates of t
he step-size distance z for a variety of muscles using existing physio
logical and biochemical data in the literature. The estimates are list
ed in Tables 1 and 2. We find that the step-size distances are cluster
ed in the range 13-17 Angstrom for nearly all muscles. Copyright (C) 1
996 Elsevier Science B.V.