Kinetics studies on microcrystalline cellulose hydrolysis by the wild-type cellulases versus the bifunctional cellulases. For convenience, keys and pictograms of the various enzymes are provided. The pictograms denoting the indicated enzymes are defined in Figure1. For free enzymes combination, micromolar enzyme concentrations correspond to each one of the enzymes. Triplicates of each reaction were carried out, and standard deviations are indicated.