Human CD227, also known as BTN3A1, with C-terminal Avi-Tag™ fused to the Fc region of Human IgG1. GenBank Accession No. NM_007048, a.a. 31-254, expressed in a HEK293 cell expression system and enzymatically biotin-labeled using Avi-tag™ technology. MW = 53 kDa. This protein runs at a higher MW by SDS-PAGE due to glycosylation.