Human cathepsin B (GenBank Accession No. NM_001908), CD33 signal peptide (a.a. 1-16) + CathepsinB (a.a. 18-339), with C-terminal His-tag, MW=43 kDa, expressed in FreeStyle 293-F cells.
Specific activity: >= 4048 pmol/min/ug
Immunogen Region
CD33 1-16, CathepsinB 18-339
Tag
C-terminal His-tag
Formulation
40 mM Tris-HCl, pH 8.0, 110 mM NaCl, 2.2 mM KCl, 3 mM DTT, 20% glycerol, and 200 mM imidazole
Species
Human
Application
Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling
Notes
25 mM MES, pH 5.0, 10 uMsubstrate (Z-Leu-Arg-AMC), 10 min, roomtemperature. Prior to assay enzyme wasactivated with preincubation at 10 ug/ml in 25mM MES, pH 5.0, 5 mM DTT for 15 min at RT.
Avoid freeze/thaw cycles.
GenBank
NM_001908
Mw(kda)
43 kDa
Synonyms
Amyloid Precursor Protein Secretase, CTSB, APP Secretase
Uniprot
P07858
Shipping Temperature
-80°C (dry ice)
Format
Aqueous buffer solution
Storage
At least 6 months at -80°C.
Reference
1. Tu, C. et al., Cancer Res. 2008 Nov 15;68(22):9147-56. 2. Hwang, JH. et al., Cancer Lett. 2009 Jan18;273(2):266-72.