In-Source Decay and Pseudo-MS(3) of Peptide and Protein Ions Using Liquid AP-MALDI.

In-Source Decay and Pseudo-MS(3) of Peptide and Protein Ions Using Liquid AP-MALDI.
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DOI:
10.1007/s13361-016-1511-0
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发表时间:
2016-12
影响因子:
3.2
通讯作者:
McDonnell, Liam A.
McDonnell, Liam A.
中科院分区:
化学3区
文献类型:
--
作者:
Ait-Belkacem, Rima;Dilillo, Marialaura;Pellegrini, Davide;Yadav, Avinash;de Graaf, Erik L.;McDonnell, Liam A.

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Atmospheric pressure MALDI on a Q-Exactive instrument was optimized for in-source decay and pseudo-MS3. The dependence of AP-MALDI ISD on the MALDI liquid matrix was investigated for peptides and proteins. The liquid matrices enabled long-life ISD signal, and exhibited high fragment ion yield and signal stability. Extensive a-, b-, c-, y-, and z-type fragment series were observed depending on the matrix used but were most extensive with 2,5-DHB. Complete sequence coverage of small peptide and intact protein-terminus sequence tags were obtained and confirmed using HCD as a pseudo-MS3 method. ᅟ The online version of this article (doi:10.1007/s13361-016-1511-0) contains supplementary material, which is available to authorized users.
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