<p> 1</p><p>Electron Photodetachment Dissociation of DNA Anions</p><p> with Covalently or Noncovalently Bound Chromophores</p><p>Valérie Gabelica*,1, Frédéric Rosu1, Edwin De Pauw1, Rodolphe Antoine2, Thibault </p><p>Tabarin2, Michel Broyer2, Philippe Dugourd2</p><p>1. Mass Spectrometry Laboratory, Université de Liège, Institut de Chimie Bat. B6c, B-4000 Liège,</p><p>Belgium.</p><p>2. Université Lyon 1 ; CNRS ; LASIM, Bat. A. Kastler, 43 Bd du 11 Novembre 1918, F-69622</p><p>Villeurbanne, France.</p><p>* Email: [email protected]; Tel: +32-4-3663432; Fax: +32-4-3663413.</p><p>Supporting information: list of negative results. 2</p><p>Power at OPO Parent Ion Wavelength Irradiation time Example spectrum exit</p><p>[dsB]5- 310 nm 5 s 6.5 mW</p><p>310 nm:</p><p>310 nm 5 s 6.5 mW [dsB+netropsin]5- 355 nm 5 s 30 mW 3</p><p>Power at OPO Parent Ion Wavelength Irradiation time Example spectrum exit</p><p>[dsB+berenil]5- 355 nm 3 s 30 mW</p><p>355 nm 40 mW 480 nm: 430 nm 85 mW 440 nm 105 mW 450 nm 115 mW [dsB+doxorubicin]5- 2 s 460 nm 125 mW 480 nm 105 mW 500 nm 105 mW 520 nm 60 mW 540 nm 75 mW 4</p><p>Power at OPO Parent Ion Wavelength Irradiation time Example spectrum exit dCCAGGTCTGAGGCGTCCTGG</p><p>490 nm 4 s 100 mW</p><p> dCCAGGTCTGAGGCGTCCTGG</p><p>450 nm 4 s 100 mW 5</p><p>Power at OPO Parent Ion Wavelength Irradiation time Example spectrum exit dCCAGGTCTGAGGCGTCCTGG</p><p>+ m-amsacrine 490 nm 4 s 100 mW</p><p> dCCAGGTCTGAGGCGTCCTGG</p><p>+ m-amsacrine 450 nm 4 s 100 mW 6</p><p>Irradiation Power at Parent Ion Wavelength Example spectrum time OPO exit [FAM-dCCAGGTCTGAGGCGTCCTGG]6- 355 nm 480 nm: 440 nm 460 nm 480 nm 2 s  80 mW 500 nm 520 nm 540 nm 560 nm</p><p>[dCCAGGTCTGAGGCGTCCTGG- 440 nm: 440 nm DABSYL]6- 460 nm 480 nm 2 s  80 mW 500 nm 520 nm</p>