Aliphatic sub-regions of 2D HSQC NMR spectra of lignin-enriched CWRs of OsCHS1-TDNA, OsCHI-CRISPR-a, and OsCHIL-CRISPR-a and their isogenic wild types. Volume integrals in the spectra refer to percentage of sum of I, II, and IIIʹ inter-monomeric units. Boxes labeled by ×2 and ×4 represent regions with scales enlarged by two- and four-fold, respectively. Colors of the contours match those of the lignin substructures shown. OsCHS1-TDNA, OsCHS1 knockout line (cv. Zhonghua 11); OsCHI-CRISPR-a, OsCHI knockout line (cv. Nipponbare).