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Determination of metal content in superoxide dismutase enzymes by capillary electrophoresis †
Author(s) -
Kazarjan Jana,
Vaher Merike,
Hunter Thérèse,
Kulp Maria,
Hunter Gary James,
Bonetta Rosalin,
Farrugia Diane,
Kaljurand Mihkel
Publication year - 2015
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201400925
Subject(s) - chemistry , superoxide dismutase , capillary electrophoresis , zinc , chromatography , metal , copper , enzyme , nuclear chemistry , biochemistry , organic chemistry
Superoxide dismutases are antioxidant scavenger enzymes that contain a metal cofactor (copper, zinc, iron, and manganese) in their active site. Metal content measurement is one of the essential steps to characterize enzyme biological activity. We have developed a capillary electrophoretic protocol for the determination of the metal content in superoxide dismutase enzymes. The background electrolyte containing 10 mM pyridine‐2,6‐dicarboxylic acid and 1 mM 1‐methyl‐3‐tetradecylimidazolium chloride at pH 3.8 was optimized for on‐column complexation of the above‐mentioned metals. The minimum detectable levels of metals ranged from 0.3 to 1.2 μg/mL. The reliability of the method was checked by parallel quantitative determination of the metal content in superoxide dismutase enzymes by graphite furnace or flame atomic absorption spectrophotometry methods.