Optimization of carbon source on total enzyme activity of cellobiohydrolases in Schizophyllum commune KMJ820 culture. Cellulose powder (filled circle), carboxymethyl cellulose (open circle), Avicel (filled square), rice straw (open square), sugarcane bagasse (filled triangle), tangerine peel (open triangle) (a). Influence of cellulose concentration on total enzyme activity of cellobiohydrolases in S. commune KMJ820 culture (b)