Definition of tropomyosin in English:

Share this entry


Pronunciation: /ˌtrəʊpə(ʊ)ˈmʌɪəsɪn/


[mass noun] Biochemistry
A protein involved in muscle contraction. It is related to myosin and occurs together with troponin in the thin filaments of muscle tissue.
Example sentences
  • The addition of regulatory proteins, troponin and tropomyosin, is known to increase the sliding speed of thin filaments in the in vitro motility assay.
  • Unfavorable interactions could occur at high ionic strength between adjacent tropomyosin molecules, between tropomyosin and troponin, or between other protein pairs.
  • Flight muscle contraction is regulated by both stretch and Ca 2 + induced thin filament (actin + tropomyosin + troponin complex) activation.


1940s: from Greek tropos 'turning' + myosin.

For editors and proofreaders

Line breaks: tropo|my¦osin

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.