Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications

Interactions between proteinaceous matter and atmospheric oxidants can affect amino acids (AAs) bioavailability, the climate, and human health. However, atmospheric reactions of proteinaceous matter remain poorly understood. PM2.5 samples were collected during spring (2019) and winter (2020) sampling campaigns conducted in Nanchang, China. Concentrations of combined and free AAs, and the δ 15 N values of combined and free glycine (C‐Gly and...