Hello Gordon, Theres two that I know of... Anomalous signal indicators in protein crystallography by P.H. Zwart, Biological crystallography 2005, D61, 1437-1448
Estimation of anomalous signal in diffraction data, Zbigniew Dauter, Biological Crystallography, 2006, D62, 867-876. The Bijvoet ratio gives an idea. |ΔF± | / |F| =(2NA/NP)1/2 / (f/f˚eff) (thats raised to power 1/2) NA- number of anomalous atoms NP - number of protein atoms f˚eff=atomic scattering factor of average protein atom=6.7 f"=atomic scattering factor of anomalous scattering atom at a certain wavelength. Arti Arti S Pandey Chemistry and Biochemistry Montana State University Bozeman MT 59717 Hello everyone, > > > > I would like to know the phasing power of different heavy atoms ie how > many seleniums per 10 kDa would be good enough to solve the structure. I > wonder is there a good website or some useful publications that people > know of, that would give this information, not just for Selenium but for > other atoms as well. > > > > Thanks in advance, > > > > M. Gordon Joyce, > > Visiting Research Fellow, > > Structural Immunology Section, > > Laboratory of Immunogenetics, > > NIH/NIAID, > > 12441 Parklawn Drive, > > Rockville, > > MD 20851 > > > > Phone: 301 594 0242 Office > > 301 496 3792 Lab > > > >
