when cells of mouse myelomonocytic leukemia cell line , wehi-3b , were cultured in the presence of actinomycin d plus the serum which was obtained from mice injected with bacterial endotoxin , i.e. , lipopolysaccharide , their histidine decarboxylase ( l-histidine carboxy-lyase , ec 4.1.1.22 ) ( hdc ) activity increased about 100-fold with a peak at 48 h .
C0014264
bacterial endotoxin
C0023810
lipopolysaccharide