Cagdas Tasoglu, Alper Arslanoglu, Talat Yalcin
The fragmentation characteristics of b 7 ions produced from proline-containing heptapeptides have been studied in detail. The study has utilized the following C-terminally amidated model peptides: PA6 , APA5 , A2 PA4 , A3 PA3 , A4 PA2 , A5 PA, A6 P, PYAGFLV, PAGFLVY, PGFLVYA, PFLVYAG, PLVYAGF, PVYAGFL, YPAGFLV, YAPGFLV, YAGPFLV, YAGFPLV, YAGFLPV, YAGFLVP, PYAFLVG, PVLFYAG, A2 PXA3 , and A2 XPA3 (where X = C, D, F, G, L, V, and Y, respectively). The results have shown that b 7 ions undergo head-to-tail cyclization and form a macrocyclic structure...
July 4, 2023: Journal of the American Society for Mass Spectrometry