Assertion: lignin | /r/HasProperty | s units
Facets:
value: almost entirely
type: DEGREE
Source sentences:
text: As discussed above, results from enzymatic assays and transgenic plants have demonstrated that angiosperm F5H, COMT, and SAD are the enzymes responsible for S biosynthesis; upregulation of F5H results in lignin almost entirely composed of S units (48, 88, 92), whereas F5H deficiency essentially abolishes S unit biosynthesis (26, 88).
text: Lignin of the Arabidopsis mutant defective in F5H (fah-1) is characterized by the absence of S units and enhanced phenylcoumaran B and dibenzodioxocin structures D2 (26, 88), whereas upregulation of F5H in Arabidopsis, tobacco, and poplar results in lignin almost entirely constituted of S units, therefore containing no phenylcoumaran B or dibenzodioxocin D2 structures (48, 88, 92).