LPS-EK LPS from E. coli K12 InvivoGen provides LPS-EK with two grades of purity: • LPS-EK is a standard lipopolysaccharide (LPS) preparation. It was extracted by a phenol-water mixture. LPS-EK contains other bacterial components, such as lipopeptides, and therefore stimulates both TLR4 and TLR2. • Ultra-pure LPS-EK was extracted by successive enzymatic hydrolysis steps and purified by the phenol-TEA-DOC extraction protocol. Ultrapure LPS-EK only activates the TLR4 pathway. Working concentration: 1 ng - 10 µg/ml Endotoxin level: 1 x 106 EU/mg LPS-EK Specificity: TLR4 and TLR2 agonist LPS-EK Ultrapure Specificity: TLR4 agonist