Molecular Modeling Database

MMDB contains 3D macromolecular structures, including proteins and polynucleotides structures and is linked to the rest of the NCBI databases, bibliographic citations, taxonomic classifications, and sequence and structure neighbors. Entrez is the integrated, text-based search and retrieval system used at NCBI for the major databases, including PubMed, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, and others.