An endopeptidase of bean leaves

摘要

Bean leaves yielded an enzyme which hydrolyzed casein and hemoglobin to large peptide fragments. The protease exhibited maximal activity at pH 9 to 10, an isoelectric point of 8.8, and a molecular weight of about 100ensp;000. During leaf growth the protease increased in a manner suggestive of a developmental role in the control of protein content.