Predicted to enable actin monomer binding activity and calcium ion binding activity. Involved in cardiac muscle contraction; cell growth involved in cardiac muscle cell development; and regulation of the force of heart contraction. Located in myofibril. Human ortholog(s) of this gene implicated in familial hypertrophic cardiomyopathy and hypertrophic cardiomyopathy 10. Orthologous to human MYL2 (myosin light chain 2). [provided by Alliance of Genome Resources, Apr 2022]