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Lignins are cell wall phenolic heteropolymers which result from the oxidative coupling of three monolignols, p-coumaryl, coniferyl and sinapyl alcohol, in a reaction mediated by peroxidases. The most distinctive variation in the monomer composition of lignins in vascular plants is that found between the two main groups of seed plants. Thus, while gymnosperms lignins are typically composed of G units,...
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