TRANSFORMATION OF TRANS-4-HYDROXYCINNAMIC ACID BY A LACCASE OF THE FUNGUS TRAMETES VERSICOLOR

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Abstract
A lignin precursor, trans-4-hydroxycinnamic acid, was incubated with an extracellular laccase from the fungus Trametes versicolor. Oxidative coupling of the substrate occurred, and dimers were isolated by thin-layer chromatography. One such dimer was structurally identified as trans-4-hydroxy-3-(trans-4′-cinnamyloxy) cinnamic acid using mass spectrometric and proton nuclear magnetic resonance analyses. The significance of both the substrate and product relative to lignin synthesis, lignin degradation, and humus synthesis is discussed. © Williams & Wilkins 1991. All Rights Reserved.

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