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. Author manuscript; available in PMC: 2012 Oct 21.
Published in final edited form as: ACS Chem Biol. 2011 Aug 23;6(10):1127–1135. doi: 10.1021/cb2001473

Figure 1.

Figure 1

Structures of Activity-Based Probes (ABPs). The reporter tags, FITC and biotin, were coupled to the N-terminus of C21 to generate fluorescein-conjugated C21 (F-C21) and biotin-conjugated C21 (B-C21).