FAQ
- protein is not expressed or cannot be purified
 - crystals don't grow
 - phases too bad
 - model does not refine
 - B-factor too high
 - The FAQ of PDBwiki
 - why is there a difference between the Rfactors from Refmac and Sfcheck?
 - Coot: I get bizarre connectivity and other weirdness on reading files if your structure looks like this
 - Conserved Waters: How to find waters that are conserved between two different PDB files of the same or similar structures.