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. Author manuscript; available in PMC: 2008 Aug 17.
Published in final edited form as: Biochemistry. 2006 Jun 20;45(24):7586–7597. doi: 10.1021/bi0603928

Figure 4.

Figure 4

Arg Hε region of one-dimensional NMR data, collected as a function of pH from 1.9 to 5.5. These long-range interactions on the penultimate C-terminal Arg result from the titratable carboxylate groups on the N-termini. pH dependent interactions are summarized in Figure 5, and complete pKa analyses are provided in supplementary material. Legend: A. Peptide 4 = DFDGEMPGVLRF-NH2, B. Peptide 2 = DFDGAMPGVLRF-NH2, C. Peptide 10 = GFGDAMPGVLRF-NH2, D. Peptide 7 = GFGDEMSMPGVLRF-NH2, E. Peptide 5 = SGSGAMPVLRF-NH2, F. Peptide 1 = EMPGVLRF-NH2