The human IL-3, IL-5 and GM-CSF receptors are each composed of both unique a subunits and a common beta subunit. The a subunits are low affinity ligand binding proteins while the beta subunits do not themselves bind ligand, but are required for high affinity binding by the a subunits. In contrast, the mouse IL-3 receptor has two distinct beta subunits, one that functions only in IL-3 mediated cell signaling and a second that is shared with IL-5 and GM-CSF. The murine beta-subunits are 91% homologous at the amino acid level but only 56% homologous to the human beta subunit. Although neither the murine nor the human beta subunit contains tyrosine kinase domains, both activate tyrosine phosphorylation mediated signaling pathways.
InvitrogenCD131 Monoclonal Antibody (1C1), Biotin, eBioscience™ CD131 Monoclonal Antibody (1C1), Biotin, eBioscience™
Cat # 13-1319-82
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