Nomenclature	Interleukin‐2 receptor	Interleukin‐4 receptor type I	Interleukin‐4 receptor type II	Interleukin‐7 receptor	Interleukin‐9 receptor
Subunits	Interleukin‐2 receptor subunit β (Ligand‐binding subunit), Interleukin‐2 receptor subunit γ (Other subunit), Interleukin‐2 receptor subunit α (Ligand‐binding subunit)	Interleukin‐4 receptor subunit α (Ligand‐binding subunit), Interleukin‐2 receptor subunit γ (Other subunit)	Interleukin‐13 receptor subunit α1 (Other subunit), Interleukin‐4 receptor subunit α (Ligand‐binding subunit)	Interleukin‐2 receptor subunit γ (Other subunit), Interleukin‐7 receptor subunit α (Ligand‐binding subunit)	Interleukin‐2 receptor subunit γ (Other subunit), Interleukin 9 receptor (Ligand‐binding subunit)
Endogenous agonists	IL‐2 (IL2, P60568)	IL‐4 (IL4, P05112)	IL‐13 (IL13, P35225), IL‐4 (IL4, P05112)	IL‐7 (IL7, P13232)	IL‐9 (IL9, P15248)
Endogenous antagonists	IL‐1 receptor antagonist (IL1RN, P18510)	–	–	–	–
Antagonists	Ro26‐4550 177	–	–	–	–
Selective antagonists	AF12198 [3]	–	–	–	–