Tropomyosin is a two-stranded alpha-helical coiled coil protein found in cell cytoskeletons. ==Myosin and the Actin skeleton== All organisms contain structures that provide physical integrity to their cells. These structures are collectively known as the cytoskeleton, and one of the most ancient systems is based on filamentous polymers of the prot...
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http://en.wikipedia.org/wiki/Tropomyosin
(from the article `muscle`) Tropomyosin is a rod-shaped molecule about 40 nm long. Two strands of tropomyosin molecules run diametrically opposed along the actin filaments. ...
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http://www.britannica.com/eb/a-z/t/84
<protein> Protein (66 kD) associated with actin filaments both in cytoplasm and (in association with troponin) in the thin filament of striated muscle. ... Composed of two elongated _ helical chains (each about 33 kD), 40 nm long, 2 nm diameter. Each chain has six or seven similar domains and interacts with as many G actin molecules as there ...
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http://www.encyclo.co.uk/local/20973
(tro″po-mi´o-sin) a muscle protein of the I band that inhibits contraction by blocking the interaction of actin and myosin, except when influenced by troponin.
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http://www.encyclo.co.uk/local/21001
Protein (66 kD) associated with actin filaments both in cytoplasm and (in association with troponin) in the thin filament of striated muscle. Composed of two elongated a -helical chains (each about 33 kD), 40nm long, 2nm diameter. Each chain has six or seven similar domains and interacts with as many G-actin molecules as there are domains. Not only does the binding of tropomyosin stabilize the F-actin, but the association with troponin in striated muscle is important in control by calcium ions.
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http://www.encyclo.co.uk/visitor-contributions.php
Type: Term Pronunciation: trō′pō-mī′ō-sin Definitions: 1. A fibrous protein extractable from muscle; sometimes specified as tropomyosin B to distinguish it from tropomyosin A (paramyosin) prominent in mollusks.
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http://www.medilexicon.com/medicaldictionary.php?t=94209
(tro;puo-mi;uo-sin) A filamentous protein that attaches to actin in the thin myofilaments and that acts, together with another protein called troponin, to inhibit and regulate the attachment of myosin cross bridges to actin.
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http://www.mhhe.com/biosci/abio/glossary.mhtml
No exact match found.
