Immunoglobulin G1-kappa, anti-[Homo sapiens interleukin 6 (IL6, IL-6)], chimeric monoclonal antibody; gamma1 heavy chain (1-449) [Mus musculus VH (IGHV5-9-4*01 - (IGHD)-IGHJ4*01) [8.8.12] (1-119) - Homo sapiens IGHG1*01 (120-449)], (222-213')-disulfide with kappa light chain (1'-213') [Mus musculus V-KAPPA (IGKV4-55*01-IGKJ2*01) [5.3.9] (1'-106') - Homo sapiens IGKC*01 (107'-213')]; (228-228'':231-231'')-bisdisulfide dimer