Recombinant human high affinity IgE receptor, α-chain (FcεRIα), 0.1% Na-azide

Recombinant fusion protein of the human FcεRIα extracellular domain (2 copies) fused to human serum albumin. Binds human IgE with high affinity (KD < 1 nM), mimicking the native receptor on mast cells and basophils.