Predicted to enable serine-type endopeptidase inhibitor activity. Acts upstream of or within hematopoietic progenitor cell differentiation. Predicted to be located in cytoplasm. Predicted to be active in extracellular space. Is expressed in alimentary system; reproductive system; skin; and thymus. Orthologous to human SERPINB12 (serpin family B member 12). [provided by Alliance of Genome Resources, Apr 2022]