References & Attribution - Protein Data Bank
The primary global archive of experimentally determined 3D structures of biological macromolecules. PDB data is available under the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication.
1. Berman, H.M., Westbrook, J., Feng, Z., Gilliland, G., Bhat, T.N., Weissig, H., Shindyalov, I.N. and Bourne, P.E. (2000) The Protein Data Bank. Nucleic Acids Research 28: 235-242. doi:10.1093/nar/28.1.235