Phone: (650) 496-1248; email: gro.xand@kciwgdes.nohtanojAuthor information ??? Article notes ??? Copyright and License information ???Received 2003 Jun 4; Accepted 2003 Oct 31.Copyright ?? 2003, The Rockefeller University PressThis article has been cited by other articles in PMC.AbstractInterleukin (IL) 23 is a heterodimeric cytokine composed of a p19 subunit and the p40 subunit of IL-12.