9014-74-8 Usage
Uses
Typical conditions for fusion protein cleavage:Adjust the concentration of the fusion protein to 1.5 mg/ml and a pH between 7.0-8.0 with 500 mM Tris-HCl, pH 8.0, 2.0 mM CaCl2, and 1% Tween? 20 Add enterokinase to fusion protein solution at a ratio of ~ 0.02 units per 1 mg fusion protein and mixIncubate reaction mixture at ~25 °C for 16 hours
Definition
An enzyme found in the small intestine, which converts trypsinogen into trypsin.
General Description
Enterokinase is a highly specific serine protease that is used for the removal of the FLAG peptide from N-terminal and Met-N-terminal fusion proteins. It does not remove the C-terminal FLAG.
Biochem/physiol Actions
Enterokinase is a membrane bound serine protease that specifically and rapidly converts trypsinogen to trypsin, thereby, triggering the conversion of other zymogens to active enzymes. It has a molecular mass of approximately 150 kDa. The enzyme is a heterodimer consisting of 35-47 kDa subunits. The light and the heavy chains are linked by two disulfide bridges. It is a glycoprotein containing 35% carbohydrate. The polypeptide chain of trypsinogen is hydrolyzed only after an -(Asp)4-Lys- sequence. The enzyme is inhibited by soybean trypsin inhibitor. Enterokinase is typically used in protein modification and amino acid sequence determination.
Check Digit Verification of cas no
The CAS Registry Mumber 9014-74-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,1 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 9014-74:
(6*9)+(5*0)+(4*1)+(3*4)+(2*7)+(1*4)=88
88 % 10 = 8
So 9014-74-8 is a valid CAS Registry Number.
