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- W2020008757 abstract "Trapped oxytocin (OT) peptide dianions and copper−oxytocin complex dianions are subjected to electron detachment when irradiated by a UV light. Electron photodetachment experiments as a function of the laser wavelength were performed on the native disulfide-containing ring oxytocin, the reduced dithiol oxytocin, and the CuII−oxytocin complex. The electron detachment yield was used to monitor the excited electronic spectrum of the trapped ions. The spectra can be used as a fingerprint of the ionization state of the tyrosine chromophore under different structural environments. In gas-phase oxytocin dianion [OT-2H]2−, the tyrosine is deprotonated while it is neutral for the reduced form of oxytocin [OTSH-2H]2−. Optical spectra for the copper complex dianion [OT-4H+Cu]2− are in favor of a neutral tyrosine in the complex. A structure with the metal cation chelated to four deprotonated amide groups is proposed for this complex." @default.
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- W2020008757 date "2009-05-21" @default.
- W2020008757 modified "2023-09-27" @default.
- W2020008757 title "Optical Properties of Isolated Hormone Oxytocin Dianions: Ionization, Reduction, and Copper Complexation Effects" @default.
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- W2020008757 doi "https://doi.org/10.1021/jp810342s" @default.
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