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Corning® Reusable Phenolic GPI 13-415 screw cap with PTFE Liner

Company: Corning
Catalog#: 9998-13
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Permethylation and Microfractionation of Sulfated Glycans for MS Analysis
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2020-05-20
[Abstract]  Sulfated glycans are barely detectable in routine mass spectrometry (MS)-based glycomic analysis due to ion suppression by the significantly more abundant neutral glycans in the positive ion mode, and sialylated non-sulfated glycans in the negative ion mode, respectively. Nevertheless, the negative charge imparted by sulfate can be advantageous for selective detection in the negative ion mode if the sialic acids can first be neutralized. This is most conveniently achieved by a concerted sample preparation workflow in which permethylation is followed by solid phase fractionation to isolate the sulfated glycans prior to MS analysis. Importantly, we demonstrated that conventional NaOH/DMSO slurry permethylation method can retain the sulfates. Instead of extracting permethylated glycans into ... [摘要]  [摘要 ] 硫酸化的聚糖是勉强detecta 常规质谱(MS)为基础的BLE glycomic 分析,由于通过在显著更丰富中性聚糖离子抑制了正离子模式,和唾液酸化的非硫酸化的聚糖中的negat 香港专业教育学院离子模式,分别。然而,如果可以首先中和唾液酸,则硫酸盐赋予的负电荷可能有利于以负离子模式进行选择性检测。这可以通过一致的样品制备流程最方便地实现,在该流程中,进行甲基化后,进行甲基化,然后进行固相分级分离以分离硫酸化的聚糖。重要的是,我们证明了传统的NaOH / DMSO浆料过甲基化方法可以保留硫酸盐。代替将全甲基化聚糖提取到氯仿中进行样品净化,可将反相C18柱与自装胺尖或混合模式弱阴离子交换柱结合使用,以高收率获得未硫酸化,单硫酸化和将硫酸化的全甲基化聚糖分别分散在不同的部分中,以进行糖酵解分析。

[背景 ] 带有磺基唾液酸基LeX 糖基的硫酸化甘氨酸罐是L-选择素的配体,参与生理和炎症状态的淋巴细胞归巢(Rosen ,2004;Kawashima ,2006)。许多聚糖阵列研究还表明,硫酸化糖苷是几种半乳糖凝集素(Ideo 等,2002)和Siglecs (Bochner ...

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