Carboxylesterase 1 isoform b human

recombinant, expressed in baculovirus infected BTI insect cells

Carboxylesterase 1 human, esterase, carboxylesterase
Enzyme Commission number:
EC Number:

Quality Level


expressed in baculovirus infected BTI insect cells



specific activity

≥500 units/mg protein


5 mg/mL


(0.5 ml)

shipped in

dry ice

storage temp.


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General description

Carboxylesterase 1 is a member of a large multigene carboxylesterase family. These enzymes are responsible for the hydrolysis of ester- and amide-bond-containing drugs such as cocaine and heroin. They also hydrolyze long-chain fatty acid esters and thioesters. This enzyme is known to hydrolyze aromatic and aliphatic esters and is necessary for cellular cholesterol esterification. It may also play a role in detoxification in the lung and/or protection of the central nervous system from ester or amide compounds.
Carboxylesterase (CE) belongs to serine hydrolase family. It is widely present in the human body. Five isoforms of carboxylesterase is present in humans. It is encoded by CES1 gene mapped to 16q22.2 in human chromosome.


Carboxylesterase 1 isoform b human has been used in the reaction to convert Amplex red to resorufin in horse radish peroxidase and oxygen independent manner. It has also been used in the development of an emission ratiometric two-photon probe (SE1) for quantitation in situ.
Delivers high catalytic activity, ideal for robust high-throughput screening assays including drug-drug interaction studies, and pharmacokinetic studies for evaluating pro-drugs and non-CYP pathways of elimination.

Biochem/physiol Actions

Carboxylesterase (CE) is implicated in drug metabolism in liver and hepatic steatosis. Deficiency of CE in humans causes obesity, hyperlipidemia, insulin insensitivity, and cancer.

Unit Definition

One unti will hydrolyze one nanomole of 4-nitrophenyl acetate per minute at pH 7.4 at 37°C


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Non classical monocytes levels, increased by subcutaneous fat-Secretome, are associated with less Rehospitalization after heart failure admission
Eiras S, et al.
Journal of Cardiovascular Translational Research, 10(1), 16-26 (2017)
A carboxylesterase-selective ratiometric fluorescent two-photon probe and its application to hepatocytes and liver tissues
Park SJ, et al.
Chemical Science, 7(6), 3703-3709 (2016)
Carboxylesterase converts Amplex red to resorufin: Implications for mitochondrial H2O2 release assays
Miwa S, et al.
Free Radical Biology & Medicine, 90, 173-183 (2016)
XieMei Tang et al.
Critical reviews in eukaryotic gene expression, 22(3), 179-187 (2012-11-13)
Tuberculosis remains one of the most prevalent and deadly infectious diseases, largely due to the emergence of multidrug-resistant and extensive drug-resistant Mycobacterium tuberculosis, especially the coinfection with HIV. Mycobacterium Ag85 complex (Ag85A, B, and C), with a carboxylesterase consensus sequence...
Zhe-Yi Hu et al.
Analytical and bioanalytical chemistry, 405(5), 1695-1704 (2012-12-15)
Dabigatran etexilate (DABE) is an oral prodrug that is rapidly converted by esterases to dabigatran (DAB), a direct inhibitor of thrombin. To elucidate the esterase-mediated metabolic pathway of DABE, a high-performance liquid chromatography/mass spectrometry based metabolite identification and semi-quantitative estimation...

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