Reacts equally with free cardiac troponin I (cTnl) and cTnl forming complexes with other troponin components. Not affected by heparin, phosphorylation, oxidation and troponin complex formation. Recognizes an epitope located between amino acid residues 18 and 28 of cTnI. No cross-reaction with skeletal muscle troponin I.

Store at 2-8 °C.