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A6103

Sigma-Aldrich

Aprotinin bovine

recombinant, expressed in Nicotiana (tobacco), ≥5 TIU/mg protein, ≥98% (SDS-PAGE)

Synonym(s):
BPTI, Basic pancreatic trypsin inhibitor, Kallikrein-trypsin inactivator, Kunitz protease inhibitor
CAS Number:
Numer EC:
Numer MDL:
NACRES:
NA.77

pochodzenie biologiczne

bovine

Poziom jakości

300

rekombinowane

expressed in Nicotiana (tobacco)

linia produktu

BioUltra

próba

≥98% (SDS-PAGE)

forma

powder

specific activity

≥5 TIU/mg protein

masa cząsteczkowa

~_6.5 kDa

technique(s)

inhibition assay: suitable

rozpuszczalność

0.85% sodium chloride: 5 mg/mL

numer dostępu UniProt

temp. przechowywania

2-8°C

Gene Information

cow ... PTI(404172)

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Opakowanie

1, 25, 100 mg in glass bottle

Działania biochem./fizjol.

Aprotinin is a competitive serine protease inhibitor that inhibits trypsin, chymotrypsin, kallikrein and plasmin. It had earned a place as an antiinflammatory and antithrombotic adjunct to cardiac surgery, but its value has been called into question.Aprotinin forms stable complexes with and blocks the active sites of enzymes. Binding is reversible with most aprotinin-protease complexes dissociating at pH >10 or <3. Effective concentration equimolar with protease.

Definicja jednostki

One trypsin inhibitor unit (TIU) will decrease the activity of 2 trypsin units by 50% where one trypsin unit will hydrolyze 1.0 μmole of N-α-benzoyl-DL-arginine p-nitroanilide (BAPNA) per min at pH 7.8 at 25 °C.

Uwaga dotycząca przygotowania

Aprotinin is freely soluble in water (>10 mg/ml) and in aqueous buffers of low ionic strengths. Dilute solutions are generally less stable than concentrated ones. Solution stability is pH dependent; a range of 1-12 can be tolerated. Repeated freeze-thaw cycles should be avoided. Due to its compact tertiary structure, aprotinin is relatively stable against denatura­tion due to high temperature, pH extremes, organic solvents, or proteolytic degradation (only thermolysin has been found capable of degrading aprotinin after heating to 60-80 °C). The high basicity of aprotinin causes it to adhere to commonly used dialysis tubing and even gel filtration matrices, but the use of acetylated materials and concentrated salt solutions (=0.1 M NaCl in buffer) minimizes the problem. Sterilization may be achieved by filtration through a 0.2 μm filter.
Contains no animal-derived components or impurities, and is manufactured by transient expression of the aprotinin message in RNA (+)-strand tobacco mosaic virus vectors propagated in non-transgenic Nicotiana plants. This is a recombinant form of the native, bovine-sequence aprotinin, which is traditionally isolated from bovine lung by methods involving fractional precipitation, gel filtration, and ion exchange chromatography. Unlike animal-derived aprotinin, this product is isolated and purified from plant tissue by proprietary methods.

Kod klasy składowania

11 - Combustible Solids

WGK

WGK 1

Temperatura zapłonu °F

Not applicable

Temperatura zapłonu °C

Not applicable

Środki ochrony indywidualnej

Eyeshields, Gloves, type N95 (US)

Certificate of Analysis

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Certificate of Origin

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