T9549

Thrombin from bovine plasma

powder, suitable for cell culture, ≥1,500 NIH units/mg protein (E1%/280 = 19.5)

• Synonym(s): Factor IIa
• CAS Number: 9002-04-4
• EC Number: 3.4.21.5 (BRENDA, IUBMB)
• EC Number: 232-648-7
• MDL number: MFCD00166053
• UNSPSC Code: 12352204

Properties

• form: powder
• specific activity: ≥1,500 NIH units/mg protein (E1%/280 = 19.5)
• mol wt: heavy chain ~31 kDa; light chain ~6 kDa
• technique(s): cell culture | mammalian: suitable
• UniProt accession no.: P00735
• shipped in: dry ice
• storage temp.: −20°C
• Gene Information: cow ... F2(280685)

Description

General description

Thrombin is the final coagulation protease in regard to hemostasis, promoting both procoagulant and anticoagulant effects.

Application

Thrombin is used for site specific cleavage of recombinant fusion proteins containing an accessible thrombin recognition site for removal of affinity tags. Thrombin has been used in a study to assess an expression and purification system for the biosynthesis of adenosine receptor peptides for biophysical and structural characterization.

Biochem/physiol Actions

Serine protease that selectively cleaves Arg-Gly bonds in fibrinogen to form fibrin and fibrinopeptides A and B.

Unit Definition

Activity is expressed in NIH units, and is measured by direct comparison to an NIH thrombin reference standard.

Reconstitution

When reconstituted with 1 mL water, vial contains stated activity in 0.15 M sodium chloride and 0.05 M sodium citrate, pH 6.5.

Analysis Note

Activity is expressed in NIH units obtained by direct comparison to a NIH Thrombin Reference Standard, Lot K.

The NIH assay procedure uses 0.2 mL of diluted plasma (1:1 with saline) as a substrate and 0.1 mL of thrombin sample (stabilized in a 1% buffered albumin solution) based on a modification of the method of Biggs. Only clotting times in the range of 15-25 seconds are used for determining thrombin concentrations.

Other Notes

View more information on thrombin at www.sigma-aldrich.com/enzymeexplorer.

Safety Information

• Pictograms: GHS08,GHS07
• Signal Word: Danger
• Hazard Statements: H315,H319,H334,H335
• Precautionary Statements: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable