- a protein of muscle tissue that binds calcium ions and is involved in contraction.
Origin of troponin
[troh-puh-nin ahy, trop-uh-]
- 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. 2018
- 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.
- 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.