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. 2019
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.