Fig. 8
Transcriptional analysis of chb1, eg1 and xyr1 in different mutant and parental strains. Relative transcription levels of the endogenous cbh1, eg1 and xyr1 of the Δste20 strain (a–c), the P tcu1 -sho1 strain (d–f) and the P tcu1 -ypd1 strain (g–i) were determined. All strains were cultured on 1% (w/v) Avicel supplied with or without 20 μM CuSO4. *P < 0.05, **P < 0.01