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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Chem Res Toxicol. 2010 Sep 27;23(10):1556–1567. doi: 10.1021/tx100146v

Figure 7.

Figure 7

MALDI-TOF mass spectra of controlled exonuclease digests of DNA 11 mer 5′-CGG ACX AGA AG -3′ where X = 3: 3′→5′ digest with PDE 1 (A), digest with PDE 1 for extended time (B); 5′→3′ digest with PDE II (C) and digest with PDE II for extended time (D). The signals corresponding to doubly charged ions are marked with an asterisk (*).