BCMA receptor is identified as areceptor for the BAFF protein. Based on this, it is proposed amedical use of antibodies to the BCMA and BCMA extracellular domain, and a medical use of polypeptides comprising afragment of BCMA receptor, or variant of a fragment of BCMA receptor.Receptor BCMA je identifikovaný ako receptor pre proteín BAFF. Na základe toho je navrhnuté medicínske použitie protilátok proti BCMA a extracelulárnej doméne BCMA a medicínske použitie polypeptidov obsahujúcich fragment receptora BCMA, prípadne variant fragmentu receptora BCMA.