Skip to Content
Merck
All Photos(2)

Documents

A6279

Sigma-Aldrich

Aprotinin

3-7 TIU/mg protein, saline solution

Synonym(s):

BPTI, Bovine pancreatic trypsin inhibitor, Trasylol, Trypsin inhibitor (basic)

Sign Into View Organizational & Contract Pricing
All Photos(2)

About This Item

Empirical Formula (Hill Notation):
C284H432N84O79S7
CAS Number:
9087-70-1
Molecular Weight:
6511.44
MDL number:
MFCD00130541
UNSPSC Code:
12352202
NACRES:
NA.77

product name

Aprotinin from bovine lung, saline solution, 3-7 TIU/mg protein

biological source

bovine

Quality Level

300

sterility

aseptically filled

form

saline solution

specific activity

3-7 TIU/mg protein

mol wt

~6,500

solubility

H2O: soluble >10 mg/mL

UniProt accession no.

P00974

storage temp.

2-8°C

InChI key

ZPNFWUPYTFPOJU-UHFFFAOYSA-N

Gene Information

cow ... PTI(404172)

Looking for similar products? Visit Product Comparison Guide

General description

Aprotinin is a 58 amino acid-long protein, with a calculated molecular weight of 6512 Da, that acts as a serine protease inhibitor. Known also as bovine pancreatic trypsin inhibitor (BPTI), aprotinin inhibits serine proteases such as chymotrypsin, kallikrein, plasmin and trypsin.

Application

Aprotinin is largely used as an inhibitor of trypsin.

Biochem/physiol Actions

Aprotinin is a competitive serine protease inhibitor that forms stable complexes with and blocks the active sites of enzyme. This binding is reversible, and most aprotinin-protease complexes will dissociate at extreme pH levels >10 or <3. Structurally, Aprotinin is a monomeric globular protein derived from bovine lung that consists of 58 amino acids, arranged in a single polypeptide chain with three crosslinking disulfide bridges.

Caution

Aprotinin products should be stored at 2-8°C.

Unit Definition

One Trypsin Inhibitor Unit (TIU) will decrease the activity of two trypsin units by 50%, where one trypsin unit will hydrolyze 1.0 μmole of N-alpha-benzoyl-DL-arginine p-nitroanilide per minute at pH 7.8 and 25°C. Another commonly used unit is the KIU, with 1 TIU = 1,300 KIU.

Preparation Note

This product is an aseptically filled solution in 0.9% NaCl and 0.9% benzyl alcohol. It has an activity of 3-7 TIU/mg protein and 3-21 TIU/mL solution.

Storage Class Code

12 - Non Combustible Liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Molecular basis for p38 protein kinase inhibitor specificity
Lisnock et al.
Biochemistry, 38(11), 3456-3456 (1999-03-17)
Association between use of antenatal magnesium sulfate in preterm labor and adverse health outcomes in infants.
Robert Mittendorf et al.
American journal of obstetrics and gynecology, 189(2), 613-613 (2003-10-04)
William M Maniscalco et al.
American journal of physiology. Lung cellular and molecular physiology, 282(4), L811-L823 (2002-03-07)
Proper formation of the pulmonary microvasculature is essential for normal lung development and gas exchange. Lung microvascular development may be disrupted by chronic injury of developing lungs in clinical diseases such as bronchopulmonary dysplasia. We examined microvascular development, angiogenic growth
Kazuya Machida et al.
PloS one, 5(10), e13470-e13470 (2010-10-27)
Tyrosine kinases drive the proliferation and survival of many human cancers. Thus profiling the global state of tyrosine phosphorylation of a tumor is likely to provide a wealth of information that can be used to classify tumors for prognosis and
Brandon L Panaro et al.
Molecular metabolism, 37, 100990-100990 (2020-04-13)
Glucagon-like peptide-1 is a nutrient-sensitive hormone secreted from enteroendocrine L cells within the small and large bowel. Although GLP-1 levels rise rapidly in response to food ingestion, the greatest density of L cells is localized to the distal small bowel
View All Related Papers

Articles

Aprotinin

While aprotinin and bovine pancreatic trypsin inhibitor (BPTI) are the same protein sequence, the term aprotinin is typically used when describing the protein derived from bovine lung.

Protocols

Enzymatic Assay of Aprotinin

Objective: To standardize a procedure for the enzymatic assay of Aprotinin.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service