1. Anti-infection
  2. Influenza Virus
  3. Aprotinin


Cat. No.: HY-P0017
Handling Instructions

Aprotinin is a bovine pancreatic trypsin inhibitor (BPTI) inhibitor which inhibits trypsin and chymotrypsin with Kis of 0.06 pM and 9 nM, respectively.

For research use only. We do not sell to patients.

Aprotinin Chemical Structure

Aprotinin Chemical Structure

CAS No. : 9087-70-1

Size Price Stock Quantity
10 mM * 1 mL in Water USD 344 In-stock
Estimated Time of Arrival: December 31
10 mg USD 60 In-stock
Estimated Time of Arrival: December 31
50 mg USD 240 In-stock
Estimated Time of Arrival: December 31
100 mg USD 384 In-stock
Estimated Time of Arrival: December 31
200 mg   Get quote  
500 mg   Get quote  

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Customer Review

Based on 3 publication(s) in Google Scholar

Top Publications Citing Use of Products

    Aprotinin purchased from MCE. Usage Cited in: Am J Physiol Cell Physiol. 2017 Dec 1;313(6):C632-C643.

    Effects of protease inhibitor PIC, a serine protease inhibitor AEBSF and trypsin and chymotrypsin inhibitors Aprotinin (Aprot, 0.1 mM) on PRR cleavage induced by BSA in HK-2 cells.
    • Biological Activity

    • Protocol

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    • Customer Review


    Aprotinin is a bovine pancreatic trypsin inhibitor (BPTI) inhibitor which inhibits trypsin and chymotrypsin with Kis of 0.06 pM and 9 nM, respectively.

    IC50 & Target

    Ki: 0.06 pM (Trypsin), 9 nM (Chymotrypsin)[1]

    In Vitro

    Aprotinin, a serine protease inhibitor isolated from bovine lung, is a complex protease inhibitor that is an antifibrinolytic, inhibits contact activation, and decreases the inflammatory response to cardiopulmonary bypass[2]. Aprotinin inhibits trypsin (bovine, Ki= 0.06 pM), chymotrypsin (bovine, Ki= 9 nM), plasmin (human, 0.23 nM)[1]. Aprotinin is also a competitive protein inhibitor of NOS activity. It inhibits NOS-I and NOS-II with Ki values of 50 μM and 78 μM, respectively[3]. Aprotinin significantly inhibits fibrinolysis with an IC50 of 0.16±0.05 μM[4].

    In Vivo

    High dose aprotinin can reduce blood loss and transfusion requirements associated with primary cardiac procedures such as coronary artery bypass graft (CABG) or heart valve replacement surgery[5]. Aprotinin inhibits thrombus formation in a dose-dependent manner. Aprotinin at a dose of 1.5 mg kg-1 (bolus) and 3 mg kg-1 h-1 infusion (maintenance infusion) causes a tendency towards a reduction in bleeding time. Aprotinin significantly reduces the bleeding time starting at a dose of 3 mg kg-1 bolus plus 6 mg kg-1 h-1 showing a reduction of approximately 84%±2.9%. At the highest dose of 5 mg kg-1 and 10 mg kg-1 h-1, the strongest effects are observed[4]. Aprotinin may affect tumor necrosis factor-alpha (TNF) levels. Soluble TNFRI levels are significantly increased following I/R in the aprotinin treated wild type mice and not detected in all TNFRInull mice[6].

    Clinical Trial
    Molecular Weight




    CAS No.




    Sequence Shortening





    Room temperature in continental US; may vary elsewhere.

    Powder -80°C 2 years
      -20°C 1 year
    In solvent -80°C 6 months
      -20°C 1 month
    Solvent & Solubility
    In Vitro: 

    H2O : 100 mg/mL (15.36 mM; Need ultrasonic)

    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 0.1536 mL 0.7679 mL 1.5358 mL
    5 mM 0.0307 mL 0.1536 mL 0.3072 mL
    10 mM 0.0154 mL 0.0768 mL 0.1536 mL
    *Please refer to the solubility information to select the appropriate solvent.
    Animal Administration

    Rats: Male Wistar rats (180-220 g) are used in the study. Aprotinin is dissolved in physiological saline. Aprotinin is administered by bolus injection followed by a maintenance infusion. The doses given are 1.5 mg kg-1 and 3 mg kg-1 h-1, 3mg kg-1 and 6 mg kg-1 h-1 up to 5 mg kg-1 and 10 mg kg-1 h-1. Plasma concentrations for the two agents are assessed by pharmacokinetic studies in rats[4].

    Mice: An intact mouse model of ischemia/reperfusion (30 min-I/60 min-R) is used and left ventricular peak + dP/dt is measured in wild type mice (WT, C57BL/6; n=10), WT mice with aprotinin (4mL/kg; n=10), transgenic mice devoid of the TNFRI (TNFRInull; n=10), and TNFRInull with aprotinin (n=10)[6].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

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