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troponin

[ troh-puh-nin, trop-uh- ]

noun

, Biochemistry.
  1. a protein of muscle tissue that binds calcium ions and is involved in contraction.


troponin

/ trōpə-nĭn,trŏpə- /

  1. One of the proteins that make up the thin filaments of muscle tissue and that regulate muscle contraction and relaxation. Troponin occurs in three forms bound together in a complex. One of the three forms is a receptor of calcium ions that induces structural changes that allow the actin in the thin filaments to interact with myosin, causing contraction.


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Word History and Origins

Origin of troponin1

1965–70; tropo(myosin) ( tropo-, myosin ) + -n- (of uncertain origin) + -in 2
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Example Sentences

The doctors asked Fanone if he’d ever had heart problems, because his body was flooded with troponin, a chemical indicating cardiac distress.

From Time

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