Abstract
A direct theoretical approach is described for using viscometric data to determine standard units of carboxymethylcellulase as recommended by the Commission on Enzymes. Application of the theory showed that under suitably defined conditions calculated units were directly proportional to the quantity of enzyme used for assay. When the theory was applied to a kinetic analysis of enzyme action, a linear relationship was obtained from a Lineweaver-Burk plot and allowed the Michaelis-Menten constant to be readily calculated. The theory can also be modified so that relative though arbitrary enzyme units can be obtained from one simple calculation. The method should be applicable to other depolymerases that cleave their substrate randomly.
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