Electrospray mass spectrometry has been used to measure the masses of the species present in solutions of three serine proteases (alpha-chymotrypsin, subtilisin Carlsberg and subtilisin BPN') before, during and after completion of the hydrolytic reaction with cinnamoyl imidazole and indole acryloyl imidazole. The masses measured during the reaction demonstrated that covalent O-acyl enzyme intermediates had been formed.
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| http://dx.doi.org/10.1016/0014-5793(91)80867-3 | DOI Listing |
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