We welcome comments, and every message will be read and considered. However authors of SCOP are scientists who are extremely busy with their own research projects (of which SCOP is only one).
In particular, we can only reply to messages directly related to the scop database and the classification it embodies.
For general information about the Protein Data Bank (PDB), we suggest that you contact the PDB directly. The PDB Web site is http://www.rcsb.org/pdb/.
We apologize for not being able to more helpful, but we do not have the resources to answer all of the enormous number of queries we receive. We hope that you are able to obtain the information you require from other sources.