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. Author manuscript; available in PMC: 2014 Feb 13.
Published in final edited form as: Mol Reprod Dev. 2012 Dec 4;80(2):80–101. doi: 10.1002/mrd.22130

Table 2.

Human seminal fluid protease inhibitors.

Protease inhibitor class Protein name GI Reference
Cysteine
Cystatin A 48145945 (Pilch and Mann 2006)
Cystatin SN 118188 (Pilch and Mann 2006)
CST6 74724686 (Pilch and Mann 2006)
Cystatin C 4503107 (Fung et al. 2004)
Cystatin S 4503109 (Fung et al. 2004)

Metalloprotease inhibitor
Tissue inhibitor of metalloproteinase 1 4507509 (Pilch and Mann 2006)
Tissue inhibitor of metalloproteinase 2 4507511 (Pilch and Mann 2006)
Tissue inhibitor of metalloproteinase 3 4507513 (Pilch and Mann 2006)

Peptidase inhibitor
Peptidase inhibitor 15 7705676 (Pilch and Mann 2006)

Serine
Alpha-1-antitrypsin 1703025 (Fung et al. 2004; Pilch and Mann 2006)
Plasma serine protease inhibitor 194018472 (Fung et al. 2004)
Acrosin-trypsin inhibitor 123985 (Pilch and Mann 2006)
Alpha-1-antichymotrypsin 112874 (Pilch and Mann 2006)
Alpha-2-antiplasmin 112907 (Pilch and Mann 2006)
Amyloid-beta A4 protein 112927 (Pilch and Mann 2006)
Amyloid-like protein 2 1703344 (Pilch and Mann 2006)
Angiotensinogen 113880 (Pilch and Mann 2006)
Anosmin-1 134048661 (Pilch and Mann 2006)
Antileukoproteinase I 113636 (Pilch and Mann 2006)
Antithrombin III 113936 (Pilch and Mann 2006)
CD109 (TGF-beta-1-binding protein) 117949389 (Pilch and Mann 2006)
Epididymal secretory protein E4 20141958 (Pilch and Mann 2006)
Inter-alpha-trypsin inhibitor heavy chain H5 187609608 (Pilch and Mann 2006)
Kallistatin 68067608 (Pilch and Mann 2006)
Kunitz-type protease inhibitor 1 61252335 (Pilch and Mann 2006)
Kunitz-type protease inhibitor 3 152031689 (Pilch and Mann 2006)
Kunitz-type protease inhibitor 4 74749362 (Pilch and Mann 2006)
Maspin (serpin B5) 229462757 (Pilch and Mann 2006)
Neuroserpin (serpin I1) 3183087 (Pilch and Mann 2006)
PEBP-1 1352726 (Pilch and Mann 2006)
PEDF (serpin F1) 313104314 (Pilch and Mann 2006)
Peptidase inhibitor 15 (SugarCrisp) 74735410 (Pilch and Mann 2006)
Placental thrombin inhibitor (serpin B6) 161784343 (Pilch and Mann 2006)
Plasma protease C1 inhibitor 124096 (Pilch and Mann 2006)
Protein AMBP 122801 (Pilch and Mann 2006)
Protein C inhibitor (serpin A5) 322510122 (Pilch and Mann 2006)
Putative protease inhibitor WAP8 126302615 (Pilch and Mann 2006)
Squamous cell carcinoma antigen 1 (serpin B3) 20141712 (Pilch and Mann 2006)
Thyroxine-binding globulin (serpin A7) 1351236 (Pilch and Mann 2006)
Tissue factor pathway inhibitor 2 1351226 (Pilch and Mann 2006)
Transcortin (serpin A6) 115851 (Pilch and Mann 2006)
SPINT3 189571689 (Clauss et al. 2011)
SPINT4 110626171 (Clauss et al. 2011)
SPINT5 (sequence only available from mouse) 53794664 (Clauss et al. 2011)

Protease inhibitors identified in human seminal plasma, listed by protease inhibitor class. Protease classes are based either on experimental data or computational prediction. GI: NCBI identifier.