Serpin Family A Member 4
KST
Kallistatin
KLST
KAL
PI4
Serine (Or Cysteine) Proteinase Inhibitor, Clade A (Alpha-1 Antiproteinase, Antitrypsin), Member 4
Serpin Peptidase Inhibitor, Clade A (Alpha-1 Antiproteinase, Antitrypsin), Member 4
Sserpin Family A Member 4
Peptidase Inhibitor 4
Kallikrein Inhibitor
Serpin A4
PI-4
Protease Inhibitor 4 (Kallistatin)
Testicular Secretory Protein Li 22
Predicted to enable serine-type endopeptidase inhibitor activity. Located in extracellular exosome. Biomarker of diabetic retinopathy. [provided by Alliance of Genome Resources, Jul 2025]
Forensic Context
A study in humans demonstrated that the SERPINA4 is a plasma protein discriminant of disease severity in alcohol-associated hepatitis, exhibiting large abundance shifts between severe and nonsevere disease states and correlating with clinical severity scores [Argemi et al. DOI:10.1016/J.Ajpath.2022.08.009].