Elsilimomab (Anti-IL-6 / IFNb2) is an IgG1 monoclonal antibody against interleukin-6 (IL-6), with a KD of 22 pM and an IC50 of 1.4 nM. Elsilimomab has the potential to be used in research of multiple myeloma, renal cell carcinoma, and rheumatoid arthritis (RA). MW : 145.96 KD.