MMDB: Entrez's 3D-structure database.
Yanli WangJohn B. AndersonJie ChenLewis Y. GeerSiqian HeDavid I. HurwitzCynthia A. LiebertThomas MadejGabriele H. MarchlerAron Marchler-BauerAnna R. PanchenkoBenjamin A. ShoemakerJames S. SongPaul A. ThiessenRoxanne A. YamashitaStephen H. BryantPublished in: Nucleic Acids Res. (2002)