tokens: Kinase renaturation tests designed to detect reactivated protein kinases after electrophoresis in sodium dodecyl sulfate - polyacrylamide gels revealed the presence of a 60 - kDa kinase in the washed immunoprecipitate obtained from liver cytosol using anti - AHR antibody ( IgG ) and protein A / G / agarose beads but not when a nonspecific IgG was used instead of anti - AHR antibody .