Fig. 2.

¹H–¹³C HSQC NMR spectra of cell wall gels from samples. Lignin aromatic regions are shown for the original poplar wood (A), fresh fungus comb (B), middle-aged fungus comb (C), and mature fungus comb (D). Correlations from the major aromatic ring unit types are well dispersed and color coded by their indicated structures. See SI Appendix, Table S2 for signal assignments.