In sandwich ELISAs, less than 0.2% cross-reactivity with recombinant mouse IL-27, recombinant human (rh) IL-12, and rhIL-12 p40 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. I