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1 Miles Laboratories, Inc., Elkhart, Indiana
2 G. D. Searle & Co., Chicago, Illinois
Attempts to distinguish between bradykinin and kallidin in assays using isolated organs and whole animals were unsuccessful. Electrophoresis likewise did not distinguish them. Chromatograms of bradykinin made by trypsin on bovine serum were not different from those of kallidin. However, bradykinin made by venom of Agkistrodon contortrix acting on dog serum definitely had two different components, and there is a suggestion that kallidin from dog serum might have two components which behave nearly alike.
Submitted on August 18, 1960