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Provides access to citations for biomedical literature from MEDLINE, life science journals, and online books. Some links to full-text content. Some coverage back to 1809. Covers chemicals and bioassays, DNA and RNA, data and software, domains and structures, genes and expression, genetics and medicine, genomes and maps, homology, literature, proteins, sequence analysis, taxonomy, training and tutorials, and variation. Searchable by author, date, grant number journal, MeSH variables, EC/RN number, etc. Limitable by type of article species, subsets, language, sex, age, etc. PubMed is part of the larger NCBI website. Customizable personal accounts available.