Query Specification

  -db            Database name
  -query         Query string

Spell Check

  -spell         Correct misspellings in query

Document Order

  -sort          Result presentation order

Sort Choices by Database

  gene           Chromosome, Gene Weight, Name, Relevance

  geoprofiles    Default Order, Deviation, Mean Value, Outliers, Subgroup Effect

  pubmed         First Author, Journal, Last Author, Pub Date, Recently Added,
                 Relevance, Title

  (sequences)    Accession, Date Modified, Date Released, Default Order,
                 Organism Name, Taxonomy ID

  snp            Chromosome Base Position, Default Order, Heterozygosity,
                 Organism, SNP_ID, Success Rate

Note

  All efilter shortcuts can also be used with esearch

Examples

  esearch -db pubmed -query "opsin gene conversion OR tetrachromacy"

  esearch -db pubmed -query "Garber ED [AUTH] AND PNAS [JOUR]"

  esearch -db nuccore -query "MatK [GENE] AND NC_0:NC_999999999 [PACC]"

  esearch -db protein -query "amyloid* [PROT]" |
  elink -target pubmed -label prot_cit |
  esearch -db gene -query "apo* [GENE]" |
  elink -target pubmed -label gene_cit |
  esearch -query "(#prot_cit) AND (#gene_cit)" |
  efetch -format docsum |
  xtract -pattern DocumentSummary -element Id Title