Reacts equally with free cardiac troponin I (cTnl) and cTnl forming complexes with other troponin components. Not affected by heparin, phosphorylation and oxidation. Recognizes an epitope located between amino acid residues 169 and 184 of cTnI. Less than 10% cross-reactivity with skeletal muscle troponin I.

Store at 2-8 °C.