Recombinant human IL2RB (interleukin 2 receptor, beta), encompassing amino acids 27-239. This construct contains a C-terminal Avi-Tag™ followed by a FLAG-tag. The recombinant protein was enzymatically biotinylated using the Avi-Tag™ and affinity purified. HiP™ indicates a high purity protein (≥90% pure) and less than 10% aggregation as measured by gel filtration.