The FCRN protein is a cell surface receptor that conveys passive humoral immunity through the selective uptake of monomeric IgG in milk. FCGRT-B2M Heterodimer Protein, Mouse (Biotinylated, HEK293, His-Avi) is a recombinant protein dimer complex containing mouse-derived FCGRT-B2M Heterodimer protein, expressed by HEK293 , with C-Avi, C-His labeled tag. FCGRT-B2M Heterodimer Protein, Mouse (Biotinylated, HEK293, His-Avi), has molecular weight of ~46 kDa.