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. Author manuscript; available in PMC: 2012 Dec 6.
Published in final edited form as: Angew Chem Int Ed Engl. 2011 Sep 16;50(45):10699–10702. doi: 10.1002/anie.201104512

Figure 1.

Figure 1

a. Mature ghrelin (R = 23 amino acids). b. Ghrelin activity-based probe, phosphonofluoridate 1. c. Cartoon depicting labeling of serum proteins via a copper(I)-catalyzed azide-alkyne cycloaddition reaction.