We studied fluctuations in the displacement of silica beads driven by single molecules of the motor protein kinesin, moving under low mechanical loads at saturating ATP concentrations. The variance in position was significantly smaller than expected for the case of stepwise movement along a regular lattice of positions with exponentially distributed intervals. The small variance suggests that t...

Tobacco mosaic virus (TMV) is one of the devastating plant viruses in the world that infects more than 200 plant species. Movement protein plays a supportive role in the movement of other plant viruses, and viral coat protein is highly expressed in infected plants and affects replication and movements of TMV. In order to investigate genetic variation in the terminal fragment sequence in Iranian...

Introduction: Most neurodegenerative diseases are associated with the disruption of axonal transport and this might also be related to diabetes-associated disorders affecting the nervous system. Cytoplasmic dynein is a very important motor driving the movement of a wide range of cargoes toward the minus ends of microtubules. The effects of endurance training on dynein motor protein expression i...

aging has negative effects on motor and cognitive functions, so it is essential to identify appropriate strategies to prevent the decrease of motor and cognitive functions. the aim of this research was to investigate the effect of vitamin e supplement on motor activity and spatial learning in aged rats. 36 male albino – wistar aged rats were assigned to three groups of control, vitamin e and sh...

fundamental movement skills are observable patterns of motor behaviors including locomotor, manipulative, and stability activities. the aim of this study was to assess the gross motor development and the movement skill proficiency in elementary school children in tehran city. the test of gross motor development-2 (ulrich, 2000) was administered to 712 children aged between 7 and 11. performance...

introduction: children of the ages 5-6 are in a distinct educational condition. on the one side, they are biologically inclined toward movement and on the other side their parent’s preference toward straight and categorical education like second language starts. this study investigates the effect of neshaat language and movement integrative program on children’s gross motor development and thei...

introduction: children of the ages 5-6 are in a distinct educational condition. on the one side, they are biologically inclined toward movement and on the other side their parent’s preference toward straight and categorical education like second language starts. this study investigates the effect of neshaat language and movement integrative program on children’s gross motor development and thei...

The ability to perform accurate sequential movements is essential to normal motor function. Learning a sequential motor behavior is comprised of two basic components: explicit identification of the order in which the sequence elements should be performed and implicit acquisition of spatial accuracy for each element. Here we investigated the time course of learning of these components for a firs...

In order to understand the basic physics of muscle contraction and molecular motor movement, we develop a conceptual model for nonequilibrium free energy transduction based on a 2-dimensional diiusion in a periodic force eld. It is shown that a nonconservative force is suucient and necessary for a steady-state with circular ux, but is not suucient for a global uni-directional transport thermal ...