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1. Entrez [electronic resource] : the life sciences search engine

Search database:
www.ncbi.nlm.nih.gov
Subjects:
Biology; Chemistry and Chemical Engineering; Medicine
Summary:
Entrez searches the National Center for Biotechnology Information (NCBI) databases to provide integrated access to nucleotide and protein sequence data from over 160,000 species, along with three-dimensional protein structures, genomic mapping information, PubMed MEDLINE, and more. Sequence data are combined from various sources, including GenBank, EMBL, DDBJ, RefSeq, PIR-International, PRF, Swiss-Prot, and PDB. Entrez can be searched with a wide variety of text terms such as author name, journal name, gene or protein name, organism, unique identifier (e.g., accession number, sequence ID, PubMed ID), and other terms, depending on the database being searched.

2. PubMed [electronic resource].

Search database:
www.ncbi.nlm.nih.gov
Subjects:
Chemistry and Chemical Engineering; Biology; Medicine; Toxicology and Chemical Safety; General and Reference Works
Summary:
Developed by the National Center for Biotechnology Information (NCBI), Pubmed is a free version of MEDLINE that offers links to GenBank records, other molecular sequence data, and other resources. MEDLINE, produced by the National Library of Medicine, is an index to journal articles in medicine, nursing, dentistry, veterinary medicine, the health care system, and the preclinical sciences, including both basic biomedical sciences and clinical practice. It indexes over 4,000 journals. The database contains citations from 1950 to the present with some older citations. An important feature of MEDLINE is the use of Medical Subject Headings (MeSH), a powerful tool for searching specific topics or for comprehensive general searches.

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