[Objective]To improve the ability of Clostridium acetobutylicum to utilize cellulose-containing raw materials.[Methods]Methylated recombinant expression vector p SOS95-cel9 was transformed into the Clostridium acetobutylicum ATCC824 by electrotransformation. [Results] The engineering strain ATCC824/p SOS95-cel9 was constructed successfully.The results of real-time quantitative PCR demonstrated that the cellulase gene cel9 was transcribed successfully in recombinant Clostridium acetobutylicum,the relative qu...