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A 13C-n.m.r. investigation of the ionizations within an inhibitor--alpha-chymotrypsin complex. Evidence that both alpha-chymotrypsin and trypsin stabilize a hemiketal oxyanion by similar mechanisms.
13C-n.m.r. was used to investigate the structure of the inhibitor enzyme complex formed when alpha-chymotrypsin is alkylated by L-1-chloro-4-phenyl-3-tosylamido-[2-13C]butan-2-one. Two signals are detected. The one at 204.82 +/- 0.11 p.p.m. does not titrate from pH 3 to 9 and is assigned to alkylate...
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| Main Authors: | , , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
1989
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1138442/ https://ncbi.nlm.nih.gov/pubmed/2730570 |
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