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Light-induced changes in the UVRR spectra of WT AppA126 and the W64F, W104A, and Q63L mutants. (a) WT AppA126 in the dark (solid line) and light (dotted line) states. Light − dark difference spectra are shown for (b) WT AppA126 and the (c) W64F, (d) W104A, and (e) Q63L mutants.
