Human carboxylesterase 2/CES2 HEK293 Overexpression Lysate: Product Information
This Human carboxylesterase 2/CES2 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of carboxylesterase 2/CES2 protein (Cat: 10380-H08H) from the overexpression lysate was verified.
A DNA sequence encoding the human CES2 isoform 1 (O00748-1) (Met 1-Leu 559) was expressed, with a C-terminal polyhistidine tag.
The secreted recombinant human CES2 comprises 544 amino acids with a predicted molecular mass of 60.4 kDa, as estimated in SDS-PAGE under reducing conditions.
Human carboxylesterase 2/CES2 HEK293 Overexpression Lysate: Usage Guide
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human carboxylesterase 2/CES2 HEK293 Overexpression Lysate: Synonyms
Human CE-2 Overexpression Lysate; Human CES2A1 Overexpression Lysate; Human iCE Overexpression Lysate; Human PCE-2 Overexpression Lysate
carboxylesterase 2/CES2 Background Information
Carboxylesterase 2 (CES2) is a member of the carboxylesterase family and belongs to the multigene family. Carboxylesterase 2 is responsible for the hydrolysis of ester- and amide-bond-containing drugs such as cocaine and beroin. It also serves to hydrolyze long-chain fatty acid esters and thioesters. It is speculated that carboxylesterases may play a role in lipid metabolism and the blood-brain barrier system and together with isform 1, are a serine esterase involved in both drug metabolism and activation. Human carboxylesterase 2 is commonly expressed in tumor tissues and irinotecan, a topoisomerase I inhibitor commonly used in the treatment of many solid tumors.
Imai T. et al. (2006) Human carboxylesterase isozymes: catalytic properties and rational drug design. Drug metab pharmacokinet. 21 (3): 173-85.
Guang Xu, et al. (2002) Human carboxylesterase 2 is commonly expressed in tumor tissue and is correlated with activation of irinotecan. Clin Cancer Res. 8: 2605.
Zhang, et al. (2002) Comprehensive Evaluation of Carboxylesterase-2 Expression in Normal Human Tissues Using Tissue Array Analysis. Applied Immunohistochemistry & Molecular Morphology. 10 (4): 374-80.
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