Troponin I, Cardiac Antigen ≥98%

Purified from human heart tissue and presented as a liquid native protein at ≥98% purity, this cardiac troponin I preparation is formulated in a 6 M urea reducing buffer (250 mM NaCl, 50 mM Tris-HCl, 15 mM β-mercaptoethanol, 1 mM EDTA, pH 7.2) that keeps the inhibitory subunit of the cardiac troponin complex soluble while preserving its native conformation. Distributed by Antibodies.com as a 100 µg aliquot, the unconjugated antigen serves as an immunogen, standard, or calibrator for cardiac marker assay development. Compatible platforms include ELISA and lateral-flow immunoassays, where troponin I functions as the highly specific marker for myocardial injury, including differentiation of unstable angina from myocardial infarction. The target, also referenced as TNNI3 or cTnI, is supplied for research use only and is not intended for diagnostic or therapeutic applications. For handling, store short-term at –20 °C (less than one week) and long-term at ≤ –70 °C; avoid repeated freeze-thaw cycles, and prepare working aliquots from the single-use vial to limit handling of the stock. Domestic shipments travel on cold packs and international orders are packed on dry ice to preserve the protein during transit.