Cell surface receptor which may be involved in carbohydrate-mediated communication between cells in the germinal center. Binds glycans with terminal alpha-linked mannose or fucose residues. Oligomer; disulfide-linked. In fibroblasts, expressed on the cell surface. Expressed on dividing B-cells of germinal centers in various tissues, including lymph nodes, tonsils, stomach, intestine, appendix and spleen. Phosphorylated on tyrosine residues. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay.