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Comparison of LID versus CID activation modes in tandem mass spectrometry of peptides

机译:肽串联质谱中LID和CID激活模式的比较

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We report our contribution to the :systematic investigation of peptide fragmentations performed on high-performance Tof equipment, operating in MS and MS/MS modes, such as ESI-QqTof and MALDI-Tof/Tof instruments that are commonly available today in proteomic laboratories. Whereas the former analyzer's configuration provides low-energy collision-induced dissociations (CID), the latter allows tunable activation methods of the selected parent ion to induce either metastable laser-induced dissociations (LID) or high-energy CID ('gas on spectra LID'). Fragmentation of the monoprotonated ion of 53 peptides (FW 807-2853 g/mol) was undertaken upon low-energy CID on an ESI-QTof mass spectrometer (Waters) as well as high-energy CID and LID conditions on a MALDI Ultraflex mass spectrometer (Bruker). Systematic comparison of MS/MS spectra provided useful information on the performance of each piece of equipment for efficient peptide sequencing and also insights into the observed fragmentation behaviors.
机译:我们报告了我们对在高性能Tof设备上以MS和MS / MS模式操作的肽片段化进行系统研究的贡献,例如在蛋白质组学实验室中普遍使用的ESI-QqTof和MALDI-Tof / Tof仪器。前一种分析仪的配置提供低能碰撞诱导解离(CID),而后者允许选定母离子的可调激活方法诱导亚稳激光诱导解离(LID)或高能CID('光谱LID上的气体')。在ESI-QTof质谱仪(Waters)上的低能CID以及在MALDI Ultraflex质谱仪上的高能CID和LID条件下,对53种肽(FW 807-2853 g / mol)的单质子化离子进行了裂解(布鲁克)。 MS / MS谱图的系统比较为每台仪器的性能提供了有用的信息,以进行有效的肽测序,并深入了解了观察到的片段化行为。

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