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Synthetic bradykinin antagonist peptides/peptoids have been powerful tools for delineating the roles of kinins in both normal physiology and in pathological states. Here, we report the identification of a novel, naturally occurring bradykinin B 2 receptor antagonist peptide, helokinestatin, isolated and structurally characterized from the venoms of helodermatid lizards—the Gila monster (Heloderma...
Previous peptidomic analyses of the defensive skin secretion from the North American pickerel frog, Rana palustris, have established the presence of canonical bradykinin and multiple bradykinin-related peptides (BRPs). As a consequence of the multiplicity of peptides identified and their diverse primary structures, it was speculated that they must represent the products of expression of multiple genes...
Multiple bradykinin-related peptides including a novel bradykinin structural variant, (Val 1 )-bradykinin, have been identified from the defensive skin secretion of Guenther's frog, Hylarana guentheri by a tandem mass spectrometry method. Subsequently, four different preprobradykinin cDNAs, which encoded multiple bradykinin copies and its structural variants, were consistently cloned from...
Bradykinin and (Thr 6 )-bradykinin have been identified in the defensive skin secretion of the fire-bellied toad, Bombina orientalis. The homologous cDNAs for both peptides were cloned from a skin library using a 3'- and 5'-RACE strategy. Kininogen-1 (BOK-1) contained an open-reading frame of 167 amino acid residues encoding four repeats of bradykinin, and kininogen-2 (BOK-2) contained an...
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