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. 2012 Aug 3;7(8):e42053. doi: 10.1371/journal.pone.0042053

Figure 5. Comparison of peptide binding by metabolite.

Figure 5

Comparison of preferential binding between peptides containing different nucleophilic residues (Cys, Lys, and His) in incubations with NO (A) and NQ (B). Degree of preferential binding was monitored by measuring the peak area of the unadducted peptide ion over time.