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Distance Determination in Proteins by EPR
Interspin Distance Determination
Precise measurement of electron-electron interspin distances in the range 20-80 Å is becoming more and more important, e.g. in cardiology research.
- Data from H. Hara, BrukerBiospin, K.K. Arata & T. Arata, Osaka Univ., Japan
With our ELEXSYS E580Q as well as our E680 system and the ELDOR upgrade option, DEER distance measurement experiments are now commonly employed at Q-band and W-band. The increase in frequency provides a clear increase in sensitivity in comparison to X-band DEER measurements. 
ELEXSYS systems
Human cardiac Troponin C
- Positions labelled with nitroxides by site-directed spin labelling
- Single crystal not required
- No limit in molecular weight
- Measuring time typ. 60 min
- High accuracy: 26 ± 0.2 Å