Fig. 3.From: Understanding of bacterial lignin extracellular degradation mechanisms by Pseudomonas putida KT2440 via secretomic analysis2D 1H–13C HSQC NMR spectra of lignin with different treatments at 120 h. a–e Oxygenated aliphatic region; f–j aromatic region; a and f lignin control; b and g lignin with H2O2; c and h lignin with secretome; d and i lignin with secretome and H2O2; e and j lignin with secretome and H2O2 and Mn2+. Note: the assignments and NMR-detected lignin linkages are shown in Additional file 1: Table S3 and Fig. S5Back to article page