In sandwich ELISAs, less than 0.1% cross-reactivity with recombinant human (rh) APRIL, rhBAFF, rhTACI, and recombinant mouse BCMA is observed. Reconstitute at 0.2 mg/mL in sterile PBS. Endoxin level is <0.10 EU per 1 μg of the antibody by the LAL method.