Predicted to enable peptidase inhibitor activity. Predicted to contribute to serine-type endopeptidase inhibitor activity. Involved in negative regulation of interleukin-1 beta production. Predicted to be located in cytoplasmic ribonucleoprotein granule and extracellular region. Predicted to be active in extracellular space. Is expressed in liver lobe. Orthologous to human SERPINB1 (serpin family B member 1). [provided by Alliance of Genome Resources, Apr 2022]