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Rocky Mountains Conference EPR Workshop: DEER Analysis programs testing

Program for analyzing DEER data, hosted by Sen I., Logan T., and Fajer P. in 2007. Utilizes DEFit tool for blind spectrum analysis. Detailed hardware requirements and data interpretation instructions.

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Rocky Mountains Conference EPR Workshop: DEER Analysis programs testing

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  1. Rocky Mountains ConferenceEPR Workshop: DEER Analysis programs testing

  2. DEFit (for CW spectra: CwdipFit) Sen I., Logan, T. and Fajer P., Biochemistry, 2007;46:11639-49. http://fajerpc.magnet.fsu.edu/Programs/DEFit/defit.html

  3. All spectra were provided by the anonymous symposium participants and analyzed blindly using DEFit (till today we don’t know what the spectra are) • The spectrum naming (slide titles) follow the key provided by the panel moderator, Dr. Eric Hustedt. • Hardware: Intel Duo Core2, Matlab 2007b

  4. 2a 3 Gaussians C A,B • components A and B very well defined: • narrow distributions • assymetric population • component (c) badly defined component

  5. 2b Noisy data => large error surface average distance better defined than the distribution

  6. data0001 Excellent definition of three populations … complex assymetric population

  7. data0002 one population, very well defined

  8. data0003 • components A and B very well defined: • narrow distributions • assymetric population • component (c) badly defined component

  9. last0001

  10. last0002 Spikes are not always spikes! two components one very narrow

  11. last0003 two components one very narrow

  12. last0004

  13. DATA1 low modulation depth, very long distance and very broad

  14. DATA2 three components, chi2 impovement 6x from 2 components. one extremely sharp

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