IL-12 and IL-23 are heterodimeric cytokines secreted by activated antigen presenting cells, such as macrophages and dendritic cells.
IL- 12 ja IL- 23 on heterodimeersed tsütokiinid, mida sekreteerivad aktiveeritud antigeeni esitlevad rakud (antigen presenting cells (APC)), nagu makrofaagid ja dendriidi rakud.