Human secreted CD2-Fc fusion protein, also known as LFA-2, GenBank Accession No. NM_001767, a.a. 25-209, fused at the C-terminus to the Fc portion of human IgG1, with C-terminal Avi-tag, expressed in a HEK293 cell expression system and enzymatically biotin-labeled using Avi-tag technology. MW = 50 kDa (monomer). This protein runs at a higher M.W. by SDS-PAGE due to glycosylation.