Serpin or serine protease inhibitor (Ser) are protease inhibitors.
- Ser E1 is antithrombin.
- Ser C1 is antithrombin.
- Ser A5 is protein C inhibitor.
- Ser A6 is a cortisol-binding globulin.
- Ser A8 is angiotensinogen.
- Ser A7 is a thyroxine-binding globulin.
- Ser B1 is leukocyte elastase inhibitor.
- Ser B3 is squamos cell carcinoma antigen 1.
- Ser B5 is Maspin.
- Ser crmA is cysteine and serine proteinase inhibitor.
- Ser I1 is neuroserpin.
- Ser A10 is protein Z-related protease inhibitor.
- Ser A1 is α-1 antitrypsin.
- Ser A3 is α 1-antichymotrypsin.
- Ser E1 is plasminogen activator inhibitor 1.
