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Research yields two 'firsts' regarding protein crucial to human cardiac function
Date:8/31/2012

tein to interact with the troponin/tropomyosin actin filaments. This series of events is what generates the heart's contraction that pumps blood. A subsequent removal of calcium inside each heart cell is what relaxes the heart, which allows the heart to fill with blood to be pumped on the next beat.

"Alpha-tropomyosin is a key element that makes the calcium signal either turn the heart on, making it contract, or turn it off, making it relax," Chase said. "There is an optimal range of flexibility of alpha-tropomyosin for the normal heart to function properly. The molecule can be too stiff or it can be too flexible, either of which could lead to cardiovascular disease. What we ultimately think is that evolution has tuned the mechanical properties of these proteins for optimal function in the heart."


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Contact: P. Bryant Chase
chase@bio.fsu.edu
850-644-0392
Florida State University
Source:Eurekalert  

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