protein cytokine receptor common subunit beta Csf2rb1 CD131 IUPHARobj:2306 CDw131 cytokine receptor common beta chain Aic2b PR:000001339 GM-CSF/IL-3/IL-5 receptor common beta subunit A protein that is a translation product of the human CSF2RB gene or a 1:1 ortholog thereof. This gene encodes the receptor beta chain shared by high-affinity IL5, IL3, and GM-CSF receptors. In mouse, there is also a closely related gene that encodes an IL3-specific beta chain. protein IL5RB CSF2RB Category=gene. Il3rb1 IL3RB