Fig. 4.

DNP-enabled 2D correlation spectra of unlabeled A. fumigatus solid culture (mostly conidia). Selected regions of DQF 2D dipolar ¹³C–¹³C correlation spectra are shown for (A) carbohydrates, (B) protein aliphatic and carbonyl signals, and (C) aromatics. The CO presents the carbonyl group in proteins and the CX represents protein aliphatic carbons such as Cα and Cβ. CO-CX refers to the correlation between these carbon sites. The spectrum was acquired using the DQF-DARR sequence on a 600 MHz/395 GHz DNP.