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 ?
Means of myofibril diameter and sarcomere length of the C, 25R and 40R groups are presented in Table 1.
The low molecular weight GTPase Rho regulates myofibril formation and organization in neonatal rat ventricular myocytes.
The thick protein filaments located within the myofibril of the muscle.
Significant mitochondrial edemas in the degradation blanks were also observed in 36[degrees]C group (Picture (2); 1 h, C), and the most serious degration of myofibrils was found in 36[degrees]C HS group (Picture (3); 2 h).
The principal structural factors that affect the texture are associated with the connective tissues and myofibrils proteins (actins and myosin) [51].
showed that forcing hESC-derived cardiomyocytes in 3-dimensional culture to beat faster at 3-6 Hz (180-360 beats/min) with electrical pacing markedly promoted cardiomyocyte maturation, with organized myofibril structure and improved conduction velocity, as well as more adult-like calcium handling and electrophysiological properties [40].
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.
When muscle foods are heated, the protein in the myofibrils and the connective tissue undergo changes in configuration, leading to structural changes and contraction of the muscle tissue.
1) in cardiomyocytes was initiated in the presence of an excessive amount of PK and its substrate, phosphoenolpyruvate (PEP), which resulted in irreversible conversion of ADP produced in myofibrils and other reaction sites (cf.
Figure 6-2 also shows a muscle filament, or myofibril, in cross section at various states of contraction.
Histology of heart of DXR-treated animals showed loss of myofibrils and focal cytoplasmic vacuolization.
The discs were composed of longitudinal segments running parallel to the myofilaments and transverse segments intersecting the myofibrils. The transverse segments followed either a straight or a zigzag course across the myofibril.