pdc at rsc.anu.edu.au
Sun Feb 25 21:32:44 EST 2001
I am refining a seleno-methionine substituted protein structure using
CNS. We obtained good MAD phases and the refinement has not been
problematic. However when I calculate (mFo - DFc, phi-calc) maps the
Se atoms have negative density around them. I am using the default
scatter.lib file distributed with the program.
Do other people see this phenomenon? Do I need to put in different
scattering terms for Se when working at the absorbtion edge? If so
does someone have them available?
Thanks in advance.
| | |
| __ L | |
| ,~' L_|\ Dr Paul D. Carr | tel: +61 26-125-3766 |
| ,-' \ Research School of Chemistry, | fax: +61 26-125-0750 |
| ( \ Australian National University, | |
| \ ___ + / Canberra, ACT 0200 | e-mail: |
| L,~' "\_,/ AUSTRALIA | pdc at rsc.anu.edu.au |
| u | |
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