MCR analysis of ToF-SIMS spectra. Scores (A, C) and corresponding component spectra (B, D) for the two components related to the main wood biopolymers. Comparison of (A) and (C) illustrate changes due to the xylanase:laccase mixing ratio. Panel E tabulates five descriptive peak ratios from the pure component spectra. These ratios are: Na+ (23 Da) as a percentage of the total counts in the component spectrum; lignin modification metric describing ions characteristic of guaiacyl (G) and syringyl (S) lignin relative to generic aromatic (Ar) ions; polysaccharide peak fraction describing the proportion of total lignin (L) and polysaccharide (PS) peaks; and protein coverage (P) as previously reported ,.