98 2.19 (Antonopoulou , 2008) - 7.5 ± 0.5 1.98 ± 0.27 1.87 ± 0.35 18.5 ± 2.5 17.5 ± 2.0 17.0 ± 2.0 0.025 0.035 1 39 15 22 Claassen , 2004 2.9 Caldicellulosiruptor saccharolyticus 58 4 21 Claassen , 2004