- A receptor for the heterodimeric cytokine IL-23 is composed of IL-12Rbeta1 and a novel cytokine receptor subunit, IL-23R. Parham, C., Chirica, M., Timans, J., Vaisberg, E., Travis, M., Cheung, J., Pflanz, S., Zhang, R., Singh, K.P., Vega, F., To, W., Wagner, J., O'Farrell, A.M., McClanahan, T., Zurawski, S., Hannum, C., Gorman, D., Rennick, D.M., Kastelein, R.A., de Waal Malefyt, R., Moore, K.W. J. Immunol. (2002)