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Fluorescence spectra of indole compounds in TS glass and in solution at 20°C. (A) NATA; (B) N-methyl indole; (C) 3-methyl indole; (D) Ca-parvalbumin; (E) Ca-free parvalbumin. The concentration of the compounds was ∼30 μM. The solvents are as follows: (a) water, (b) TS film at 97% humidity, (c) dry TS film, (d) n-pentane.
