One-Pot and Sequential Organic Chemistry on an Enzyme Surface to Tether a Fluorescent Probe at the Proximity of the Active Site with Restoring Enzyme Activity
enzymatic activity from the completely suppressed state of the labeled hCAII. Such restoring of the activity upon the sequential modification is quite unique compared to conventional affinity labeling methods. The peptide mapping experiment revealed that the labeling reaction was selectively directed to His-3 or His-4, located on a protein surface proximal to the active site. When the fluorescent probe