 The theoretical  EPR spectra were calculated using selected configurations of MTSL probing different micro-environments of the protein characterized by different polarity.
<meaning-changed>  The theoretical  EPR spectra were calculated using selected configurations of MTSL probing different micro-environments of the protein characterized by different polarity.
 The theoretical 9 and 94 GHz EPR spectra were calculated using selected configurations of MTSL probing different micro-environments of the protein characterized by different polarity.