MAIN DATABASES ACCESIBLE WITH ENTREZ PubMed: Bibliographic references in Molecular Biology and Medicine. Nucleotide: DNA sequences from Genbank, EMBL and DDBJ, plus from other databases or projects such as RefSeq, which contains nucleotide sequences from the Nucleotide database that have been curated or re-annotated, by the NCBI. Protein: Proteins sequences derived from translation of DNA sequences in GenBank, EMBL y DDBJ, plus sequences from PIR, SWISSPROT y Protein Data Bank (PDB). Genome: Complete genomes, chromosomes, contig maps, physical maps.