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lysyl-bradykinin, a kinin produced by the action of tissue and glandular kallikreins on low-molecular-weight kininogen and having physiologic effects similar to those of bradykinin. Formerly, the term was applied to several different peptides: bradykinin was called kallidin I or 9 and lysyl-bradykinin was called kallidin II or 10.
A decapeptide vasodilator consisting of bradykinin with a lysyl group attached to the amino terminus. This group can be removed by an aminopeptidase in the blood to yield bradykinin.