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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Int J Mass Spectrom. 2011 Jul 1;304(2-3):98–104. doi: 10.1016/j.ijms.2010.06.001

Figure 4.

Figure 4

(a) Mass spectrum of impurity identified at m/z 1843 and (b) modeled data for (n−1) short-mer phosphorothioate oligonucleotide with chemical composition of C226H226N68O127P22S22. This chemical composition is consistent with the (n−1) short-mer sequence 5′-CG TCG TTT TGT CGT TTT GTC GTT-3′.