| 31. | Glu113 serves as the counterion, stabilizing the protonation of the Schiff linkage between Lys296 and the chromophore.
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| 32. | Cathepsin-D is an aspartic protease that depends critically on protonation of its active site Asp residue.
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| 33. | Protonation and other electrophilic additions will occur at only one nitrogen due to further deactivation by the second nitrogen.
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| 34. | Evidence from 17 O NMR spectroscopic data suggests that protonation of the sulfite ion gives a mixture of isomers:
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| 35. | Protonation is a part of fundamental chemical reaction and is a step in many optical properties, among others.
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| 36. | My advice would be to describe the protonation and deprotonation reactions separately, and the qualitative factors favoring each.
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| 37. | The amino group is protonated and I'm worried that'll discourage protonation of the carboxyl group.
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| 38. | Such a compound may exist with a different extent of protonation depending on pH and the acid dissociation constant.
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| 39. | In the exo-pyridyl isomer on the left, the usual steric hindrance control blocks protonation from above.
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| 40. | The structure of the various protonation states of the decavanadate ion has been examined by 51 V NMR spectroscopy.
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