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. The IL-1 system includes two agonists (IL-1 and IL-1), converting enzymes, antagonists, two receptors (IL-1 RI and IL-1 RII) and the IL-1 rece