[Analysis of the structure and function of creatine kinase active sites using affinity modification]

Data of studies of creatine kinase from rabbit skeletal muscle (EC 2.7.3.2) by affinity labelling and affinity chromatography are reviewed. Efficiencies of these techniques are demonstrated for analysis of cooperative interactions of the enzyme's active sites, nature of non-equivalence of enzyme subunits, distances between active sites which are situated on different subunits, dynamics of enzyme-substrate interactions and usefulness of affinity labelling for localization of amino acid residues in the enzyme active sites.