کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7603937 1492237 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gas-phase structures and proton affinities of N-terminal proline containing b2+ ions from protonated model peptides
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Gas-phase structures and proton affinities of N-terminal proline containing b2+ ions from protonated model peptides
چکیده انگلیسی

- The intensity of AAAA fragment from b6 ions (PXAAAA where X = A, F, E, W and H) is higher than PA, PF, and PE fragments.
- However, it is lower than PW and PH fragments in mass spectra.
- In order to explain this experimental observation, proton affinities of fragment ions were computed considering both diketopiperazine and oxazolone structures of PX ions.
- Whether the structure of b2+ ions is oxazolone or diketo could be elucidated by comparing their proton affinities of those two isomers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 393, 15 December 2015, Pages 1-8
نویسندگان
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