Bio.PDB.ic_data module
Per residue backbone and sidechain hedra and dihedra definitions.
Find this file in <your biopython distribution>/Bio/PDB/ic_data.py
Listed in order of output for internal coordinates (.pic) output file. Require sufficient overlap to link all defined dihedra. Entries in these tables without corresponding atom coordinates are ignored.
<http://www.imgt.org/IMGTeducation/Aide-memoire/_UK/aminoacids/formuleAA/> for naming of individual atoms