library(GO.db)
  ## List the possible values for columns
  columns(GO.db)
  ## List the possible values for keytypes
  keytypes(GO.db)
  ## get some values back
  keys <- head(keys(GO.db))
  keys
  select(GO.db, keys=keys, columns=c("TERM","ONTOLOGY"),
  keytype="GOID")
  ## More infomation about the dates and original sources for these data:
  metadata(GO.db)
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