Binding shift assay of parvalbumin, calmodulin and carbonic anhydrase by high-performance capillary electrophoresis.

Shifts in mobility caused by binding of Ca2+ to calmodulin and parvalbumin were studied using high-performance capillary electrophoresis in a Tris-glycine buffer, rathern than conventional polyacrylamide gel electrophoresis which requires larger amounts of sample and longer assay time. A Zn2+-binding protein, carbonic anhydrase, also showed a partial shift in mobility following Zn2+-binding.