human fibroblasts and monocytes induced with tumor necrosis factor , interleukin-1 , bacterial lipopolysaccharide ( endotoxin ) or virus infection secrete multiple forms of differentially glycosylated ifn-beta 2 polypeptides : at least a doublet of molecular mass approximately 25 kd and a triplet of mass approximately 30 kd .
C0023810
lipopolysaccharide
C0014264
endotoxin