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troponin

[ troh-puh-nin, trop-uh- ]
/ ˈtroʊ pə nɪn, ˈtrɒp ə- /

noun Biochemistry.

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

Nearby words

tropo-, tropocollagen, tropologic, tropology, tropomyosin, troponin, troponin i, tropopause, tropophilous, tropophyte, troposphere

Origin of troponin

1965–70; tropo(myosin) (see tropo-, myosin) + -n- (of uncertain origin) + -in2

Definition for troponin (2 of 2)

troponin I

[ troh-puh-nin ahy, trop-uh- ]
/ ˈtroʊ pə nɪn ˈaɪ, ˈtrɒp ə- /

noun Biochemistry.

a protein within a troponin complex that helps regulate the heartbeat and can be used as an indicator of myocardial infarction.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for troponin

troponin

[ trōpə-nĭn, trŏpə- ]

n.

A calcium-regulated protein in muscle tissue occurring in three subunits with tropomyosin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for troponin

troponin

[ trōpə-nĭn, trŏpə- ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.