Location and base selectivity on fragmentation of brominated oligodeoxynucleotides

Abstract : Bromine-modified oligodeoxynucleotides (ODNs) were fragmented in the electrospray source to study the influence of brominated bases on fragmentation. Several 13-mer ODNs containing a brominated pyrimidine base, BrdU (5-bromodeoxyuridine) or BrdC (5-bromodeoxycytidine), were analyzed. Low cone voltage fragmentation yields a loss of the brominated base with a preferential loss for the brominated base closer to the 5-end (2-position > 4-position > 12-position) as well as a preferential loss of BrdU over BrdC. Higher cone voltage produces backbone fragmentation with complementary an-base and wm ions close to the brominated base. On the basis of these observations, we located the brominated base in the sequence for all of the ODNs studied.
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https://hal.archives-ouvertes.fr/hal-00088837
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Submitted on : Monday, August 7, 2006 - 11:49:14 AM
Last modification on : Tuesday, June 4, 2019 - 4:30:11 PM

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C. Buré, B. Castaing, C. Lange, A.F. Delmas. Location and base selectivity on fragmentation of brominated oligodeoxynucleotides. Journal of Mass Spectrometry, Wiley-Blackwell, 2006, 41 (1), pp.84-90. ⟨10.1002/jms.967⟩. ⟨hal-00088837⟩

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