The Interleukin-4 receptor is a complex consisting of two chains. One chain is the high affinity IL-4 binding (p140, a chain, CD 124) chain and the other chain is the gamma chain. The high affinity IL-4 binding chain belongs to the cytokine receptor superfamily. The cytoplasmic domain contains Ser/Pro-rich regions similar to those present in the IL-2 receptor and GM-CSF receptor ß-chains. The recombinant human IL-4 soluble receptor corresponds to the human IL-4 receptor extracellular domain. The recombinant, human IL-4 sR is a potent IL-4 antagonist. This antibody will block IL-4 binding to its receptor.Synonyms: 582J2.1, IL-4R-alpha, IL4 Receptor alpha, IL4RA, Interleukin-4 receptor alpha chain