Share this entry
troponin Syllabification: tro·po·nin
Pronunciation: /ˈträpənən/ /ˈtrō-/

Definition of troponin in English:


A globular protein complex involved in muscle contraction. It occurs with tropomyosin in the thin filaments of muscle tissue.
Example sentences
  • Actin, myosin, and troponin and tropomyosin were isolated from rabbit back muscle.
  • The tropomyosin and troponin proteins on the actin filament provide the switch.
  • The addition of regulatory proteins, troponin and tropomyosin, is known to increase the sliding speed of thin filaments in the in vitro motility assay.


1960s: from tropomyosin + -n- + -in1.

Definition of troponin in:
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.

Subscribe to remove ads and access premium resources