Colorimetric Maleimide Assay Kit, ยี่ห้อ Sigma

PROPERTIES

usage

sufficient for 100 colorimetric tests

detection method

colorimetric

storage temp.

−20°C

DESCRIPTION

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.