The IL20RA/IL20RB dimer is a receptor for IL19, IL20 and IL24. The IL22RA1/IL20RB dimer is a receptor for IL20 and IL24. Heterodimer with IL20RA and heterodimer with IL22RA1. Widely expressed with highest levels in skin and testis. Highly expressed in psoriatic skin. Belongs to the type II cytokine receptor family.