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    STUDIA PHYSICA - Issue no. 2 / 2010  

Authors:  S. SIMON.
  Abstract:  In this work were analyzed cw W-band EPR spectra recorded in the temperature range from 115K to 300K on colicine A by fitting the different spectral components in the gxx region addressing the possible origin of those components. The study aims to investigate the gxx heterogeneity in W-band spectra of colicine A in two different spin labeled positions, col A 105 and col A 169, in terms of fractions of molecule populations characterized by different polarity and numbers of H-bonds to the nitroxide group. The obtained gxx values as well as the fractions of different populations are correlated to the temperature.

Keywords: bacteriocin, colicin A, EPR. 

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