Abstract
A method for oligonucleotides analysis by using capillary electrophoresis at low pH in free solution is described. It may be considered an alternative to classical analytical techniques which use basic buffers and require the presence of sieving media to separate oligonucleotides as a function of their length. On the contrary, at low pH oligo nucleotides can be separated only depending on their base composition. A large set of samples consisting of 72 synthetic oligonucleotides bearing a 5′-alkylamine moiety and designed for HLA genotyping were analysed. The quality of these synthetic oligos was easily assessed, and a single base difference in oligonucleotides of equal sequence was detected. The results suggest the application of this method to the emerging field of mutation detection and single nucleotide polymorfism analysis.
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