Fig. 1: CP-MAS 15N NMR spectra of ant cuticle.
From: Gut bacteria are essential for normal cuticle development in herbivorous turtle ants
Untreated (red line) and antibiotic treated (blue line) C. varians samples. Both spectra are normalized with respect to sample mass in the rotor and the number of accumulations. Enriched nitrogen is represented in pink. Inset depicts the 15N NMR spectrum of cuticle at natural isotopic abundance of unlabeled untreated C. varians ants.
