Predicted to enable actin binding activity and metal ion binding activity. Acts upstream of or within transition between fast and slow fiber and ventricular cardiac muscle tissue morphogenesis. Predicted to be part of troponin complex. Is expressed in several structures, including alimentary system; diaphragm; heart; nervous system; and skeletal musculature. Orthologous to human TNNI1 (troponin I1, slow skeletal type). [provided by Alliance of Genome Resources, Apr 2022]