An online resource provided by the National Center for Biotechnology Information (NCBI) It organizes GenBank sequences and links them to the literature sources in which they originally appeared
The search and retrieval system that integrates information from the National Center for Biotechnology (NCBI) databases These databases include nucleotide sequences, protein sequences, macromolecular structures, whole genomes, and MEDLINE, through PubMed
The Entrez Search System was developed by NCBI Entrez allows you to retrieve molecular biology data and bibliographic citations from integrated nucleotide (GenBank, DDBJ, EMBL), protein (Swiss-Prot, PIR, PRF, PDB), and bioliographic (PubMed) databases Within SMD database pages, external links are provided to one or more of these databases