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Ultraviolet photodissociation of chromophore-labeled oligosaccharides via reductive amination and hydrazide conjugation

机译:发色团标记的寡糖通过还原胺化和酰肼偶联作用进行紫外光解离

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摘要

The fragmentation patterns of hydrazide-conjugated and reductively aminated oligosaccharides, including lacto-N-fucopentaoses and lacto-N-difucohexaoses, produced on collisionally induced dissociation (CID) and ultraviolet photodissociation (UVPD) in a quadrupole ion trap are presented. The two derivatization methods generate different cross-ring cleavages on UVPD and CID. UVPD of hydrazide-conjugated oligosaccharides yield predominant ~(2, 4)A-type cross-ring cleavage ions. In contrast, UVPD of aminated oligosaccharides results mainly in ~(0, 1)A-type ions. Moreover, more extensive dual-cleavage pathways (i.e. internal fragment ions) were observed on UVPD.
机译:给出了在四极离子阱中通过碰撞诱导解离(CID)和紫外光解离(UVPD)产生的酰肼共轭和还原胺化寡糖,包括乳糖N-富二糖和乳糖N-二富六糖的碎裂模式。两种衍生化方法在UVPD和CID上产生不同的交叉环裂解。酰肼缀合的寡糖的UVPD产生主要的〜(2,4)A型交叉环裂解离子。相反,胺化寡糖的UVPD主要导致〜(0,1)A型离子。而且,在UVPD上观察到更广泛的双裂解途径(即内部碎片离子)。

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