Macro Creatine Kinase BB: Evidence for Specific Binding between Creatine Kinase BB and Immunoglobulin G

Abstract
In the sera of 4 female patients with proven IgG-linked creatine kinase BB (macro creatine kinase BB) the nature of the binding between creatine kinase isoenzymes and IgG was studied. The specificity towards the isoenzyme bound, the recombination of the complex after treatment with acid buffer, the site of the binding between both partners and an apparently monoclonal nature of the IgG involved in the complex indicate that a specific antigen-antibody reaction is responsible for the existence of macro creatine kinase BB in the sera investigated.