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. 2019 Jul 25;10:912. doi: 10.3389/fpls.2019.00912

FIGURE 1.

FIGURE 1

Lignin biosynthetic pathway. Alternative monomers and heterologously expressed enzymes are shown in bold. PAL, phenylalanine ammonia-lyase; C4H, cinnamate 4-hydroxylase; 4CL, 4-coumarate:CoA ligase; HCT, p-Hydroxycinnamoyl-CoA:quinate/shikimate-p-hydroxycinnamoyltransferase; C3’H, p-coumaroyl quinate/shikimate 3’-hydroxylase; CSE, caffeoyl shikimate esterase; CCoAOMT, caffeoyl-CoA O-methyltransferase; CCR, cinnamoyl-CoA reductase; F5H, ferulate 5-hydroxylase/CAld5H, coniferaldehyde 5-hydroxylase; COMT, caffeic acid O-methyltransferase; CAD, cinnamyl alcohol dehydrogenase; FMT, feruloyl-CoA monolignol transferase; PMT, p-coumaroyl-CoA monolignol transferase.