Structural origin of weakly ordered nitroxide motion in spin-labeled proteins.
Fleissner, M.R., Cascio, D., Hubbell, W.L.(2009) Protein Sci. 18: 893-908
- PubMed: 19384990 
- DOI: 10.1002/pro.96
- Primary Citation of Related Structures:  
- PubMed Abstract: 
A disulfide-linked nitroxide side chain (R1) used in site-directed spin labeling of proteins often exhibits an EPR spectrum characteristic of a weakly ordered z-axis anisotropic motion at topographically diverse surface sites, including those on heli ...