초록
<P>For direct and efficient ethanol production from cellulosic materials, we screened optimal cellulases from symbiotic protists of termites through heterologous expression with <I>Saccharomyces cerevisiae.</I> 11 cellulases, belonging to glycoside hydrolase families 5, 7, and 45 endoglucanases (EGs), were confirmed to produce with <I>S. cerevisiae</I> for the first time. A recombinant yeast expressing SM2042B24 EG I was more efficient at degrading carboxylmethyl cellulose than was <I>Trichoderma reesei</I> EG I, a major EG with high cellulolytic activity.</P>