Simultaneous production of isopropanol, butanol, ethanol and 2,3-butanediol by Clostridium acetobutylicum ATCC 824 engineered strains

AMB Express

Table 4 Reduction activities of acetone and acetoin measured in cell-free extracts of C. beijerinckii NRRL B593 and C. acetobutylicum ATCC 824 transformants harbouring pMTL500E, pFC002 and pFC007

Strain		Specific activity[μmol/min mg_protein]
Strain		acetone	acetoin	Control^*
C. beijerinckii	NRRL B593	0.063	0.069	0.015
C. acetobutylicum	ATCC 824(pMTL500E)	0.002	0.007	0.003
C. acetobutylicum	ATCC 824(pFC002)	0.152	0.069	0.009
C. acetobutylicum	ATCC 824(pFC007)	0.076	0.118	0.018