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LEUPEPTIN 亮抑酶肽 Acetyl-Leu-Leu-Arg-...

产品信息

 

LEUPEPTIN 亮抑酶肽

Structure:

Hemisulfate
Trifluoroacetate Salt
Hydrochloride
Molecular Formula
C20H38N6O4·½H2SO4
C20H38N6O4·C2HF3O2
C20H38N6O4·HCl
Molecular Weight
475.6
540.6
463.0
CAS #
103476-89-7
147385-61-3
24125-16-4

Synonym: Acetyl-Leu-Leu-Arg-al
Physical Description: White to off-white powder
Solubility: Soluble in water （50 mg/ml-clear, faint yellow solution）. Stock solutions of 10 mM in water are stable for 1 week at 4°C and 1 month if aliquoted and stored at -20°C. Stock solutions can then be diluted 1:100 to make a 100 uM working solution. Working solutions are stable for only a few hours.
Description: A modified tripeptide reversible protease inhibitor of trypsin-like proteases and some cysteine proteases including endoproteinase Lys-C, kallikrein, papain, thrombin, cathepsin B, cathepsins H and L, trypsin, calpain, trypsin and plasmin. Effective concentration is typically 10-100 uM. Little to no inhibition is seen against pepsin, cathepsins A and D and alpha-chymotrypsin. When adjusted for molarity, all three salt forms are equally effective; however, the hydrochloride salt is usually less invasive in biological settings.
Leupeptin, because of its aldehyde group, may act as a reducing agent and therefore interfere in protein determinations such as Lowry and, to a lesser extent, Bradford.
Note: Leupeptin gives multiple peaks on HPLC due to equilibria among three forms in solution. Purity determined by HPLC should take into account the three main peaks. Majority of contaminating peptide is racemized leupeptin.
The primary mechanism of inactivation is racemization of the L-arginal; the D-arginal form is totally inactive. If the aldehyde is oxidized but retains its L-configuration, the resulting compound does have some inhibitory activity.
Ordering Information：

货号
名称
产地
规格
报价/元
特价/元
LEUPEPTIN 亮抑酶肽
MPBIO
5mg
823
280
 
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