listDatabases:
Lists the KEGG databases which may be searched.
Description
Lists the KEGG databases which may be searched. In most cases,
you can also use a KEGG organism name or T number (genome identifier)
as a database name.
listDatabases()
keggList("organism") ## list all organismskeggList("hsa") ## list all human geneskeggList("genome") ## list all genome identifierskeggList("T01001") ## list all human genes