myosin

American  

[mahy-uh-sin] / ˈmaɪ ə sɪn /

noun

Biochemistry.

1. the principal contractile protein of muscle.

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myosin British  

/ ˈmaɪəsɪn /

noun

1. the chief protein of muscle that interacts with actin to form actomyosin during muscle contraction; it is also present in many other cell types

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myosin Scientific  

/ mī′ə-sĭn /

1. A protein found in muscle tissue as a thick filament made up of an aggregate of similar proteins. Myosin and the protein actin form the contractile units (sarcomeres) of skeletal muscle. In the sarcomere, actin and myosin filaments slide past each other to cause the shortening of a muscle fiber.

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Etymology

Origin of myosin

First recorded in 1865–70; my- + -ose ² + -in ²

Example Sentences

The guideline includes recommendations for adding cardiac myosin inhibitors, a new class of medication for patients with symptomatic obstructive HCM who do not get adequate symptom relief from first-line drug therapy.

From Science Daily • May 8, 2024

First, they looked to establish whether the myosin states, and their respective ATP consumption rates, were different between active periods and hibernation.

From Science Daily • Feb. 20, 2024

They found no differences in the proportion of myosin in the DRX or SRX state between the two phases.

From Science Daily • Feb. 20, 2024

To measure the rate of ATP consumption by myosin, they used a specialised test called the Mant-ATP chase assay.

From Science Daily • Feb. 20, 2024

One of the chief constituents of muscular fiber is myosin.

From A Practical Physiology by Blaisdell, Albert F.