Definition of "kallikrein" []

• Any of a set of peptidases, a subgroup of the serine protease family. (noun)

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• "The proposed treatment, ecallantide, is designed to partly block an enzyme known as kallikrein involved with the disorder."
• "Aspirin interferes with chemical mediators of kallikrein system."
• "They believe plasma kallikrein slows clotting when there is lots of sugar in the blood, although the exact mechanism remains unclear."