Predicted to enable peptidase inhibitor activity. Predicted to act upstream of or within negative regulation of peptidase activity. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Is expressed in glomerular tuft; renal cortex; s-shaped body; visceral epithelium of capillary loop renal corpuscle; and visceral epithelium of mature renal corpuscle. Orthologous to human PI15 (peptidase inhibitor 15). [provided by Alliance of Genome Resources, Apr 2022]