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.

See also

• Common misconceptions about crystallography
• Teaching crystallography
• Other crystallography links, or collections of links
• Other crystallography-related wikis
• PDBeStatistics and some explanation of it