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Circular dichroism analysis of AAT extracted from different samples: (A) CD spectra of recombinant AAT untreated (blue line) and after oxidation (red line); (B) CD spectra of AAT extracted from plasma samples of control (blue line) and COVID-19 (red lines) subjects; (C) CD spectra of AAT extracted from BALf samples of control (blue lines) and COVID-19 (red lines) subjects.
