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1H NMR spectrum of a hydrogel at 5°C (10 min after mixing). (A) Signal intensity decay during gelation. (B) -CH2- and (C) -CH3 proton signals from the peptides. TSP (3-(trimethylsilyl)-2,2′,3,3′-tetradeuteropropionic sodium) is an NMR chemical shift standard added to each peptide solution.
