Figure 2.

Characterisation of glutamine-containing P₁₁ peptide self-assembly. (a,b) Self-assembly curves from ¹H NMR analysis. Self-assembly at a range of P₁₁ peptide concentrations and overall net charge are shown in order to determine c* of negative- (a) and positive- (b) charged peptide systems. (c) Secondary structure analysis of the Amide I region in FT-IR spectra, where the various components are illustrated for a peptide that does not self-assemble: P₁₁-13 (Q,−6), [P₁₁-13] ~5 mM. (d) Secondary structure analysis of the Amide I region in FT-IR spectra, where the various components are illustrated in a self-assembling peptide system: P₁₁-8 (Q,+2), [P₁₁-8] ~5 mM.