Trypsin solutions are less stable than lyophilized or powder form. Trypsin solution products, which are prepared at 0.25% in Hank's Balanced Salts with phenol red, are stored at -20°C and assigned a shelf life of approximately 2 years from the date of quality release. Solutions prepared in medium are expected to have similar stability. Avoid repeated freeze/thaw cycles and maintain the pH at a range of 7.0 - 7.6.
T9201
Trypsin from bovine pancreas
powder, ≥7,500 BAEE units/mg solid
Synonym(s):
Serine Protease 1
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About This Item
CAS Number:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-650-8
MDL number:
Specific activity:
≥7,500 BAEE units/mg solid
Pricing and availability is not currently available.
form
powder
Quality Segment
specific activity
≥7,500 BAEE units/mg solid
mol wt
23.8 kDa
composition
, ≥90 % protein
impurities
≤3 BTEE units/mg solid Chymotrypsin
storage temp.
−20°C
Application
For trypsin digestion of peptides, use a ratio of about 1:100 to 1:20 for trypsin:peptide. The typical use for this product is in removing adherent cells from a culture surface. The concentration of trypsin necessary to dislodge cells from their substrate is dependent primarily on the cell type and the age of the culture. Trypsins have also been used for the re-suspension of cells during cell culture, in proteomics research for digestion of proteins and in various in-gel digestions. Additional applications include assessing crystallization by membrane-based techniques and in a study to determine that protein folding rates and yields can be limited by the presence of kinetic traps.
Biochem/physiol Actions
Trypsin cleaves peptides on the C-terminal side of lysine and arginine residues. The rate of hydrolysis of this reaction is slowed if an acidic residue is on either side of the cleavage site and hydrolysis is stopped if a proline residue is on the carboxyl side of the cleavage site. The optimal pH for trypsin activity is 7-9. Trypsin can also act to cleave ester and amide linkages of synthetic derivatives of amino acids. EDTA is added to trypsin solutions as a chelating agent that neutralizes calcium and magnesium ions that obscure the peptide bonds on which trypsin acts. Removing these ions increases the enzymatic activity.
Serine protease inhibitors, including DFP, TLCK, APMSF, AEBSEF, and aprotinin, amongst others, will inhibit Trypsin.
Serine protease inhibitors, including DFP, TLCK, APMSF, AEBSEF, and aprotinin, amongst others, will inhibit Trypsin.
Preparation Note
This product is from pancreas sourced from New Zealand. It is soluble in 1 mM HCl at 1 mg/mL.
Other Notes
One BAEE unit will produce a A253 of 0.001 per minute at pH 7.6 at 25°C using BAEE as a substrate.
Trypsin consists of a single chain polypeptide of 223 amino acid residues, produced by the removal of the N-terminal hexapeptide from trypsinogen which is cleaved at the Lys - lle peptide bond. The sequence of amino acids is cross-linked by 6 disulfide bridges. This is the native form of trypsin, beta-trypsin. BETA-trypsin can be autolyzed, cleaving at the Lys - Ser residue, to produce alpha-trypsin. Trypsin is a member of the serine protease family.
Disclaimer
Solutions in 1 mM HCl are stable for 1 year in aliquots and stored at -20°C. The presence of Ca2+ will also diminish the self-autolysis of trypsin and maintain its stability in solution. Trypsin will also retain most of its activity in 2.0 M urea, 2.0 M guanidine HCl, or 0.1% (w/v) SDS.
1 of 1
This Item | |||
|---|---|---|---|
| specific activity ≥7,500 BAEE units/mg solid | specific activity ≥2,500 USP units/mg solid | specific activity ≥10,000 BAEE units/mg protein | specific activity ≥9,000 BAEE units/mg protein |
| form powder | form solid | form essentially salt-free, lyophilized powder | form essentially salt-free, lyophilized powder |
| mol wt 23.8 kDa | mol wt 23.8 kDa | mol wt 23.8 kDa | mol wt 23.8 kDa |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
| impurities ≤3 BTEE units/mg solid Chymotrypsin | impurities - | impurities - | impurities - |
| Quality Level 300 | Quality Level 300 | Quality Level 200 | Quality Level 200 |
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signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk
WGK 1
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
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how can I preserve trypsin filtered in medium? 4 or -20c? without losing of activity?
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