myofibril


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Related to myofibril: myofilament, sarcoplasmic reticulum

myofibril

[¦mī·ō′fī·brəl]
(cell and molecular biology)
A contractile fibril in a muscle cell.
(invertebrate zoology)
References in periodicals archive ?
Scanning electron microscopy analysis showed structure damage of sarcomere Z-disks and presence of pleomorphic dense structures near Z-disks or between myofibrils.
The sliding filament theory of skeletal muscle contraction can explain the shortening of a single sarcomere, but when we consider multiple sarcomeres in a myofibril arranged in series, it fails to justify the movement of Z discs as each Z disc is being pulled in the opposite direction by myosin heads of adjacent sarcomeres.
2]--involved in muscle energy metabolism, glycolytic pathway in ATP generation, and organization of myofibril, respectively, that were downregulated differentially with the increase in storage time and were related particularly to K value, texture, color, and sensory characteristics.
Many of these sarcomeres are connected in a well-ordered series to form myofibrils that span from one muscle end to the other.
We previously established that, using skinned muscle fibers placed in a Ca buffer, each sarcomere exhibited stable auto-oscillation of contraction and elongation under the fixed Ca concentration of approximately 1 uM, through careful measurements of muscle fiber tension (especially using thin bundles of myofibrils ~1 um in diameter); we termed this phenomenon as spontaneous oscillatory contraction (SPOC) (see recent review by S.
Myofibrils bear most of the resting tension in frog skeletal muscle.
Table 1: Effect of feed restriction on myofibril diameter and sarcomere length of Najdi lambs
The breaking or fragmentation of the myofibril protein strands by these natural enzymes result in improved tenderness [26].
A myofibril is like a hot dog surrounded by a thin, holey skin (SR).
Inibition of protease activity 2: degradation of myofibrillar proteins, myofibril examination and determination of free calcium levels.
Thus in patients with MPD the need for an adequate diet in both energy and protein content in order to sustain baseline myofibril turnover is mandatory.
6,17) Exercise-induced muscle damage is characterised by a disruption of the sarcolemma, (2) sarcotubular system, (2,4) contractile components of the myofibril, the extracellular matrix and the cytoskeleton.