Human BAFF-R, also known as TNF Receptor Superfamily Member 13C, Tumor Necrosis Factor Receptor Superfamily Member 13C, BLyS Receptor 3, BAFFR, and B Cell-Activating Factor Receptor, GenBank Accession No. NM_052945, a.a. 23-71 fused at the C terminus to the Fc portion of human IgG1 followed by a C-terminal Avi™-tag and expressed in a HEK293 cell expression system. MW=33.5 kDa. This protein is enzymatically biotinylated using Avi-Tag technology.