Fig. 5From: Depolymerization and conversion of lignin to value-added bioproducts by microbial and enzymatic catalysisGeneral route of lignin valorization via biochemical system. Lignin is first depolymerized via microorganisms and funneling various lignin-derived aromatics into protocatechuate and catechol. The central intermediates can be eventually converted to value-added compounds via aromatic ring cleavage and TCA cycleBack to article page