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A Direct Continuous pH-Spectrophotometric Assay for Arginine Kinase Activity

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A direct and continuous spectrophotometric method was developed for determining arginine kinase (phosphoarginine synthesis) activity. Protons are produced during the phosphoarginine synthesis course, so adding the complex acid-base indicator to this solution and monitoring the decrease of absorbance of the solution at 575 nm will follow the arginine kinase activity. For this condition, one activity unit of arginine kinase was defined as 1 μmol H+ produced in 1 minute in the enzymatic reaction catalyzed by arginine kinase.

Keywords: arginine kinase; continuous assay; enzyme activity; ph-spectrophotometric

Document Type: Review Article


Publication date: 2002-12-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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