The present invention provides methods for screening for a desired filamentous fungus that produces cellulase more efficiently and/or with increased specific activity. It also provides filamentous fungi that produce cellulase more efficiently.
 Portions of this work were funded by Subcontract No. ZCO-30017-01 with the National Renewable Energy Laboratory under Prime Contract No. DE-AC36-99GO10337 with the U.S. Department of Energy. Accordingly, the United States Government may have certain rights in this invention.