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  • Title: Inhibition of [3H]captopril binding by peptide analog angiotensin converting enzyme inhibitors.
    Author: Toll L, Almquist RG.
    Journal: Biochem Biophys Res Commun; 1986 Mar 28; 135(3):770-7. PubMed ID: 3008745.
    Abstract:
    Ketomethylene containing peptide analogs, modeled after a snake venom pentapeptide, have been shown to be potent angiotensin converting enzyme inhibitors. Although the most potent compounds are up to five times more potent than captopril in inhibiting angiotensin converting enzyme activity, they are relatively weak inhibitors of [3H]captopril binding to membrane bound angiotensin converting enzyme. This indicates that inhibition of [3H]captopril binding and enzymatic activity is due to binding to distinct sites. These results suggest that the inhibitors bind to an additional site on the enzyme distinct from the captopril binding site.
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