Fig. 13

a Structures of the active PAL probe 1 and the inactive probes 2–4 and their inhibitory activity against hCAII (mM) b Active/inactive PAL probes, their hCAII inhibitory potencies (IC 50), and fluorophore-conjugated click reagents for the reactions. c A efficient photo-affinity labeling approach toward identification of carbohydrate-binding proteins by using AuNP-based multivalent carbohydrate probes