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“Thus, in vitro trypsin can directly liberate both the depressor, bradykinin , in weak alkaline conditions, and the pressor, angiotensin II, at weakly acidic pH, from the appropriate substrates.”
“The enzyme was present in active and inactive forms (n = 9), since preincubation with trypsin increased kininogenase activity from 54.8 +/- 11.8 to 230 +/- 23 pg bradykinin per milligram protein per minute.”
“It was suggested that trypsin enhanced bradykinin effect on the ileum through the release of polypeptides and, probably, other substances from the tissue used for the bioassay.”
“ Trypsin , after an initial selective sensitization to bradykinin , unspecifically damaged the preparation.”