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

Journal of mass spectrometry : JMS (2011-03-26)
Byoung Joon Ko, Jennifer S Brodbelt
ABSTRACT

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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
7-Amino-4-methylcoumarin, 99%
Sigma-Aldrich
7-Amino-4-methylcoumarin, Chromophore for substrates

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