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Arg Pro Pro Gly Phe Ser Pro Phe Arg

A nonapeptide messenger that is enzymatically produced from Kallidin in the Blood where it is a potent but short-lived agent of arteriolar dilation and increased Capillary Permeability. Bradykinin is also released from Mast Cells during Asthma attacks, from gut walls as a gastrointestinal vasodilator, from damaged Tissues as a Pain signal, and may be a Neurotransmitter.