Medical term:

tropomyosin



tropomyosin

 [tro″po-mi´o-sin]
a muscle protein of the I band that inhibits contraction by blocking the interaction of actin and myosin, except when influenced by troponin.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

tro·po·my·o·sin

(trō'pō-mī'ō-sin),
A fibrous protein extractable from muscle; sometimes specified as tropomyosin B to distinguish it from tropomyosin A (paramyosin) prominent in mollusks.
Farlex Partner Medical Dictionary © Farlex 2012

tropomyosin

(trō′pə-mī′ə-sĭn, trŏp′ə-)
n.
A protein that binds to and stabilizes actin filaments in cells. In skeletal and cardiac muscle cells, tropomysin is released after interacting with troponin and calcium, facilitating the binding of actin to myosin that causes muscle contraction.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

tro·po·my·o·sin

(trō'pō-mī'ŏ-sin)
A fibrous protein extractable from muscle; sometimes specified as tropomyosin B to distinguish it from tropomyosin A (paramyosin) prominent in mollusks.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

tropomyosin

A regulatory protein in striated muscle concerned with the binding sites for the cross bridges on thin filaments in the SARCOMERE. Tropomyosin reversibly prevents bonding, thereby preventing muscles form being in a continuous state of contraction.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

tropomyosin

a long protein molecule found in the grooves of muscle ACTIN filaments. It inhibits muscle contraction by blocking the interaction between the filaments and MYOSIN.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


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