NEGATIVE ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY OF SYNTHETIC AND CHEMICALLY-MODIFIED OLIGONUCLEOTIDES
NEGATIVE ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY OF SYNTHETIC AND CHEMICALLY-MODIFIED OLIGONUCLEOTIDES
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DOI：
10.1093/nar/22.19.3895
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发表时间：
1994-09-25
影响因子：
14.9
通讯作者：
BISCHOFF, R
中科院分区：
文献类型：
--
作者：
POTIER, N;VANDORSSELAER, A;BISCHOFF, R
We report here on the analysis of synthetic oligonucleotides by electrospray ionization mass spectrometry (ESI-MS). After intensive removal of salt ions (especially sodium cations), negative ion mass spectra, allowing mass measurement with an accuracy of 0.01%, were obtained on several oligonucleotides up to 80 nucleotides. In most cases, the resolution was sufficient to observe n-1 and n-2 forms due to internal deletions during automated synthesis, and to identify the missing nucleotides. A 132-mer, whose size is close to the limit of automated chemical synthesis, was also successfully mass measured. A quantitative study showed that ESI-MS can provide quantitative data on oligonucleotides of similar size and structure. The described methodology is used to characterize oligonucleotide analogues such as phosphorothioate oligonucleotides designed for antisense applications. Finally, analyses in the positive ion mode on a trimer TpTpT in the presence of different amine bases were performed and allowed a better understanding of the influence of these bases on the ions formation.
