myofilament


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Related to myofilament: myofibril, thin filaments

myofilament

 [mi″o-fil´ah-ment]
any of the ultramicroscopic threadlike structures composing the myofibrils of striated muscle fibers.

myofilament

(mī′ə-fĭl′ə-mənt)
n.
Any of the ultramicroscopic filaments, made up of actin and myosin, that are the structural units of a myofibril.
References in periodicals archive ?
Most myofilaments are smooth in organization, but some reveal a simple striated pattern.
We calculated the ATP consumption by integrating the myofilament model in one cycle proposed by Rice et al.
From TEM observation of normal control group and sham-operated group, we can see that the cardiac myocytes were arranged tightly, the sarcolemmas were integrated and with clear bands, bright and dark bands of paralleled myofilaments looked apparent, and the nuclei were oval and located at the cell center.
This is coherent, because the rate of pH decline affects the protein denaturation, the myofilament lattice spacing, and the shrinking of the muscle fiber, which makes it essential for the determination of meat-quality.
Epac2 activation increases phosphorylation of cardiac troponin I (cTnl) in a PKC-dependent manner resulting in increased myofilament [Ca.sup.2+] sensitivity and contractility [76].
(1992) observed the ultrastructure of autotomy-induced atrophy of muscles in the crab Carcinus maenas, such as extensive myofilament erosion and loss of organelles.
Immunohistochemical characterization of odontogenic cysts with mesenchymal and myofilament markers.
These overstretched sarcomeres have little myofilament overlap, and are likely to fail under tension and become disrupted.
Isoflurane, sevoflurane and halothane have already been shown to suppress sarcoplasmic reticulum [Ca.sup.2+] release and depress myofilament [Ca.sup.2+] sensitivity in rat ventricular myocytes (29) and in ferret cardiac muscle (30).
After that, more channels open and calcium enters and binds to a tiny structure near the membrane; then, much more calcium explodes out of that structure into the cell's inner fluid and combines with a myofilament protein called troponin.
But unlike other positive inotropes, whose action is mediated by increased intracellular calcium, levosimendan enhances cardiac myofilament sensitivity to an unchanged concentration of calcium.
The myofilament lattice collapse in these embryos has been analyzed by immunofluorescence with antibodies to myosin A and actin.