Anti-CD307a antibodies enable researchers to detect and measure the CD307a antigen in biological samples. This target is a reported synonym of the FCRL1 gene, which encodes Fc receptor like 1. This protein is believed to function as a an activating coreceptor in B-cells. The human version of CD307a has a canonical amino acid length of 429 residues and a protein mass of 46.9 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the bone marrow.