Gangliosides' analysis by MALDI-ion mobility MS.

Gangliosides' analysis by MALDI-ion mobility MS.
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DOI:
10.1039/c0an00732c
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发表时间:
2011-02-07
期刊:
The Analyst
影响因子:
--
通讯作者:
Woods AS
Woods AS
中科院分区:
其他
文献类型:
--
作者:
Jackson SN;Colsch B;Egan T;Lewis EK;Schultz JA;Woods AS

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离子迁移率与基质辅助激光解吸/电离的组合允许快速分离和分析复杂混合物(例如组织切片和细胞提取物)中的生物分子,因为同量异序脂质、肽和寡核苷酸分子离子在质量分析之前在迁移率池中预先分离。在这项研究中,MALDI-IM MS用于分析神经节苷脂,一类复杂的鞘糖脂,具有不同程度的唾液酸化。GD 1a和GD 1b,结构异构体,进行了研究,看看气相结构的影响取决于本地化的唾液酸。还分析了来自小鼠脑的总神经节苷脂提取物,以测量离子迁移率在复杂混合物中分离出不同神经节苷脂种类的有效性。
The combination of ion mobility with matrix-assisted laser desorption/ionization allows for the rapid separation and analysis of biomolecules in complex mixtures (such as tissue sections and cellular extracts), as isobaric lipid, peptide, and oligonucleotide molecular ions are pre-separated in the mobility cell before mass analysis. In this study, MALDI-IM MS is used to analyze gangliosides, a class of complex glycosphingolipids that has different degrees of sialylation. Both GD1a and GD1b, structural isomers, were studied to see the effects on gas-phase structure depending upon the localization of the sialic acids. A total ganglioside extract from mouse brain was also analyzed to measure the effectiveness of ion mobility to separate out the different ganglioside species in a complex mixture.
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