Table 1. Kinetic parameters of CbCel9A/Cel48A wild-type and its truncational mutants on cellulosic substrates ^a .

Enzyme	PASC b			Avicel (µM glucose equivalents/min/µM enzyme)	Filter paper (µM glucose equivalents/min/µM enzyme)
	k cat (s-1)	K m (mg ml-1)	k cat/K m (s-1 ml mg-1)
WT	2.0±0.3	2.6±1.0	0.8±0.3	22.8±1.3	13.1±0.3
TM1	1.6±0.2	1.8±0.6	0.9±0.3	10.2±1.0	7.0±1.8
TM2	0.2±0.0	1.5±0.6	0.1±0.0	2.2±0.1	1.3±0.2
TM3	5.1±0.3	2.3±0.3	2.2±0.3	3.5±0.7	4.5±0.6

^a The reactions were performed in a 50 mM sodium-citrate buffer with 150 mM NaCl (pH6.0) at 75°C.

^b PASC: phosphoric acid swollen cellulose.