beta-O-4 type lignin carbohydrate complex (LCC) model compounds and the corresponding beta-O-4 dimers were degraded by lignin peroxidase (LiP), and time course of oxidation of the substrates and product formation were monitored. No significant differences in the LiP catalyzed oxidation were observed between the beta-O-4 LCC model compounds and the beta-O-4 dimers. The result indicated that the sugar moiety of the beta-O-4 LCC model compounds did not prevent, at least qualitatively, reactivity of the beta-O-4 moiety in the LiP system.