The interleukin-5 receptor is a type I cytokine receptor. It is a heterodimer of the interleukin 5 receptor alpha subunit and CSF2RB.The IL-5 receptor (IL-5R) belongs to the type I cytokine receptor family and is a heterodimer composed of two polypeptide chains one α subunit which binds IL-5 and confers upon the receptor cytokine specificity and one β subunit which contains the signal transduction domains.
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