RCSB-PDB web lookups
https://data.rcsb.org/index.html#data-api
https://data.rcsb.org/data-attributes.html
pdb2ref(pdb[, url, timeout])
pdb2ref
Print the primary citation of a pdb code via web lookup
pdb2traj(code[, filename, verbose, url, ...])
pdb2traj
Return a Trajectory from a four-letter PDB code via RCSB PDB lookup
Trajectory