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. Author manuscript; available in PMC: 2017 Nov 1.
Published in final edited form as: Biochemistry. 2017 Jun 16;56(25):3178–3183. doi: 10.1021/acs.biochem.7b00271

Figure 1.

Figure 1

(A) Optimized ligand of the Ras switch II pocket elaborated with a set of electrophiles. (B) Aziridine and stabilized diazo groups preferentially react with carboxylates at pH 6. (C) Many of the electrophiles covalently label K-Ras G12C. (D) Compound 3 modestly labels G12D and G12S at pH 5.5. (E) DSF suggests that 3 and 4 may bind Ras differently.