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EPR spectra for C. gattii (NIH 444) pigments derived from d-DOPA (A) or d-tryptophan (B). The d-tryptophan EPR spectrum contained a distinctly broader peak-to-peak linewidth (∼7 G) than the d-DOPA spectra (∼4 G). Instrumental parameters are as follows: modulation amplitude, 1.6 G; microwave frequency, 9.104 GHz; microwave power, 0.50 mW; and temperature, 77K; number of scans averaged, nine.
