= URL =
 * PDBj http://www.pdbj.org/PDBID (PDBID = 1gof, 1a00, ...)
 * KEGG http://togows.dbcls.jp/entry/kegg-DBNAME/ENTRYID
 * DDBJ http://togows.dbcls.jp/entry/ddbj/ENTRYID
 * !UniProt http://www.uniprot.org/uniprot/ENTRYID
 * !PubMed http://www.ncbi.nlm.nih.gov/pubmed/ENTRYID

= PDB things =
 * ftp://ftp.protein.osaka-u.ac.jp/pub/pdb/data/structures/all/XML-noatom/{PDBID}-noatom.xml.gz
 * /PDBx:datablock/PDBx:entity_src_genCategory/PDBx:entity_src_gen/PDBx:pdbx_gene_src_ncbi_taxonomy_id
where {PDBID} should be something like "1a00" (in lowercase).