Direct from polyacrylamide gel infrared laser desorption/ionization.

Direct from polyacrylamide gel infrared laser desorption/ionization.
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直接来自聚丙烯酰胺凝胶红外激光解吸/电离。

DOI:
10.1021/ac034879n
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发表时间:
2004
期刊:
Analytical chemistry.
影响因子:
--
通讯作者:
Murray,KermitK
Murray,KermitK
中科院分区:
--
文献类型:
--
作者:
Xu,Yichuan;Little,MarkW;Rousell,DavidJ;Laboy,JorgeL;Murray,KermitK

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凝胶电泳和红外激光解吸/电离飞行时间质谱的直接组合已被证明。我们目前的结果,肽和蛋白质的红外激光解吸和电离质谱直接从聚丙烯酰胺凝胶,而不添加基质。电泳分离后,从真空干燥的十二烷基硫酸钠-聚丙烯酰胺凝胶中直接电离高达6 kDa的分析物分子。在2.94 μm波长处获得质谱,这与水和凝胶其他组分的N-H和O-H伸缩振动的IR吸收一致。每个凝胶槽加载5 nmol量的肽或蛋白质,尽管可以从一小部分凝胶斑点获得质谱。该技术显示了直接鉴定聚丙烯酰胺凝胶中所含蛋白质的母体和片段质量的希望。
The direct combination of gel electrophoresis and infrared laser desorption/ionization time-of-flight mass spectrometry has been demonstrated. We present results for infrared laser desorption and ionization mass spectrometry of peptides and proteins directly from a polyacrylamide gel without the addition of a matrix. Analyte molecules up to 6 kDa were ionized directly from a vacuum-dried sodium dodecyl sulfate−polyacrylamide gel after electrophoretic separation. Mass spectra were obtained at the wavelength of 2.94 μm, which is consistent with IR absorption by N−H and O−H stretch vibrations of water and other constituents of the gel. A 5-nmol quantity of peptide or protein was loaded per gel slot, although it was possible to obtain mass spectra from a small fraction of the gel spot. This technique shows promise for the direct identification of both parent and fragment masses of proteins contained in polyacrylamide gels.
DOI: --
发表时间: 1986-03
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影响因子: --
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