Figure 4

Atmospheric pressure matrix assisted laser desorption/ionization ion trap mass spectrometer mass spectra showing ion peaks (sodium adducts) of hydrolysates from giant reed after 48 h hydrolysis by (a) cellulases and xylanolytic enzymes and (b) cellulases and xylanolytic enzymes with acetyl xylan esterase in 50 mM sodium citrate buffer at pH 5.0 and at 45°C.