性质：

Related Categories	A to C, Analytical and Industrial Enzymes, Broad Spectrum Inhibitors of Proteolytic Enzyme Classes, Carboxypeptidase Y, Chymotrypsin, α-
form	lyophilized powder
mol wt	mol wt ~6,500
solubility	H2O: ≥5 mg/mL
storage temp.	2-8°C
Gene Information	cow ... PTI(404172)

Application

Aprotinin is largely used as an inhibitor of trypsin.

包装

1, 5 mg in glass bottle

10, 25, 100, 250 mg in poly bottle

Preparation Note

This product is a lyophilized powder with activity of 3-8 TIU/mg of solid powder. Aprotinin is freely soluble in water (>10 mg/mL) and in aqueous buffers of low ionic strengths. Dilute solutions tend to be less stable than concentrated ones, though solution stability also depends on pH. Aprotinin is relatively stable against denaturation - only thermolysin has been found capable of degrading it at 60-80°C. Sterilizaiton of Aprotinin can be achieved through filtration by a 0.2 μm filter.

Unit Definition

One Trypsin Inhibitor Unit (TIU) will decrease the activity of two trypsin units by 50%, where one trypsin unit will hydrolyze 1.0 μmole of N-alpha-benzoyl-DL-arginine p-nitroanilide per minute at pH 7.8 and 25°C. Another commonly used unit is the KIU, with 1 TIU = 1,300 KIU.

Biochem/physiol Actions

可以抑制胰蛋白酶、胰凝乳蛋白酶、激肽释放酶以及纤溶酶的丝氨酸蛋白酶抑制剂。