786-245
786-687
786-688
786-690
786-693
786-245EA
304
EUR
InStock
786-245
786-687
786-688
GENO786-690
GENO786-693
Pig MSG-Trypsin™
Enzymes
Trypsin is a serine endopeptidase that specifically cleaves peptide bonds on the carboxy side of s-aminoethyl cysteine, arginine and lysine residues and typically there is little or no cleavage at arginyl-proline and lysyl-proline bonds. The distribution of these residues in proteins allows trypsin digestion to produce peptides that are readily identified by mass spectrometry.
- Modified by methylation and TPCK treatment
- Resistant to autolysis and degradation
- Specific activity >10000 U/mg protein
Native trypsin is prone to autolysis, resulting in pseudotrypsin, which exhibits a broader proteolytic specificity (a chymotrypsin like activity) and trypsin fragments that interfere with sequence analysis. MSG-Trypsin™ is chemically methylated to yield an enzymatically active protein with maximum trypsin specificity and is extremely resistant to autolysis. In addition, the modified trypsin is TPCK treated to inactive the interfering chymotrypsin activity and the resulting protein is affinity purified and lyophilised. The resulting trypsin is extremely resistant to autolysis and has a specific activity over 10000 units/mg protein. The maximum activity is in the pH range of 7 to 9 and the activity is reversibly inactivated at pH 4.
Information de livraison: For mass spectrometry sequence analysis, a trypsin to protein ratio of 1:20 to 1:100 is recommended. For convenience, MSG-Trypsin™ is supplied lyophilised in a range of pack sizes. A specific resuspension buffer is also supplied in each pack.