Troponin I is a protein that plays a critical role in muscle contraction, specifically in cardiac and skeletal muscles. It is part of the troponin complex, which regulates the interaction between actin and myosin, the proteins responsible for muscle contraction. In the context of disease diagnosis, elevated levels of troponin I in the bloodstream can indicate cardiac injury, making it a valuable biomarker for diagnosing conditions such as myocardial infarction (heart attack) and heart failure.
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