Fig. 7
In situ 3D SRS imaging to track xylan distribution in deacetylated corn stover cell wall before and after xylan digestion. a–d Before digestion. a′–d′ The same cell wall regions in a–d after xylanases digestion for comparison. Xylan Raman frequency at 1471 cm−1 was chosen for SRS imaging. a, b, a′, b′ cell corner; c, d, c′, d′cell wall between two cell corners