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Key Documents

MAK162

Sigma-Aldrich

Colorimetric Maleimide Assay Kit

sufficient for 100 colorimetric tests

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About This Item

UNSPSC Code:
12161503
NACRES:
NA.84

usage

sufficient for 100 colorimetric tests

detection method

colorimetric

relevant disease(s)

cancer

storage temp.

−20°C

Related Categories

General description

Maleimide is an unsaturated imide used in protein conjugation reactions. The direct measurement of maleimide moieties following conjugation reactions by spectrophotometric analysis at 302 nm is insensitive due to the small extinction coefficient (620M-1 cm-1) and complicated by protein absorbance at this wavelength.

Suitability

Suitable for quantifying maleimide groups

Principle

The colorimetric maleimide quantiation kit provides a simple and direct procedure for measuring maleimide groups. The sample is first reacted with a known amount of excess thiol and then the remaining unreacted thiol is assayed using 4,4′-DTDP (4,4′-Dithiodipyridine). The amount of maleimide is calculated as the difference between the initial amount of thiol and the amount of unreacted thiol after the complete reaction of all maleimide groups.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

188.6 °F - closed cup

Flash Point(C)

87 °C - closed cup


Certificates of Analysis (COA)

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Carbon Composites: Composites with Carbon Fibers, Nanofibers, and Nanotubes (2016)
Efficient site-specific labeling of proteins via cysteines.
Kim Y, et al.
Bioconjugate Chemistry, 19(3), 786-791 (2008)

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