Troponin
noun, Biochemistry.
1.
a protein of muscle tissue that binds calcium ions and is involved in contraction.
noun, Biochemistry.
1.
a protein within a troponin complex that helps regulate the heartbeat and can be used as an indicator of myocardial infarction.
troponin tro·po·nin (trō’pə-nĭn, trŏp’ə-)
n.
A calcium-regulated protein in muscle tissue occurring in three subunits with tropomyosin.
troponin
(trō’pə-nĭn, trŏp’ə-)
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.
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