Abstract
Summary
The action of whole dried plasma and its primary fractions separated by low temperature-ethanol procedure on casein was investigated. No kinase was added and there was no previous treatment of the protein preparations with chloroform or any other agents. Proteolytic activity was demonstrated by determinations of acid soluble total nitrogen and “tyrosine.”
Human plasma Fraction I contains a high degree of proteolytic activity. The enzyme is inactivated at 80°C and functions at near neutrality.
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