Figure 3.
1H NMR spectra of peptides at different gelation time points. The signal in the range of 7.0–7.8 ppm is the aromatic proton signal from tryptophan in each peptide. (a) Gel A (P1 + P2); (b) Gel C (P1 + P4); (c) Gel D (P1 + P5).
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