Predicted to enable cysteine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to act upstream of or within cell maturation and chondrocyte differentiation. Predicted to be located in cytosol and extracellular region. Predicted to be active in extracellular space. Orthologous to several human genes including CST5 (cystatin D). [provided by Alliance of Genome Resources, Apr 2022]