抄録
The mutant X816 synthesizing protease and amylase at high rates was isolated from original strain K. S. by the irradiation of X-ray.
In order to see whether the protease in this mutant is identical with the enzyme in original strain or it is more active enzyme. Studies have been made on the protease isolated from these strains. It was found that the mutant strain synthesized the enzyme protein twice as much as original strain did. And the enzyme appears to be identical with that in original strain with respect to specific activity, electrophoresis, heat sensitivity, sedimentation constant and the elution pattern on DEAE-cellulose chromatography.
