Human FCGR2B, known as CD32B, and FCG2, GenBank Accession No. NM_004001.4, a.a. 46-217, with C-terminal Avi-His-Tag, expressed in a HEK293 cell expression system and enzymatically biotin-labeled using Avi-tag™ technology. Biotinylation is confirmed to be ≥90%. MW = 23 kDa. This protein runs at a higher MW by SDS-PAGE due to glycosylation.