Differentiation and sequencing of three constitutional isobaric 18-mer DNA oligomers using low-energy collision tandem mass spectrometry

Differentiation and sequencing of three constitutional isobaric 18-mer DNA oligomers, namely: GATTCATAGCTACGAATC1, AATTCGTAGCTACGAATC2, and AATTCGTACCTACGAATG3 using electrospray ionization tandem mass spectrometry with a hybrid QqToF-MS/MS instrument.