LTA-SA Lipoteichoic acid from S. aureus Lipoteichoic acid (LTA) is a major immunostimulatory component of Gram-positive bacteria. Like LPS, LTA is an amphiphile formed by a hydrophilic polyphosphate polymer linked to a neutral glycolipid. LTA stimulates immune cells through TLR2 to produce TNF-α and other inflammatory cytokines. Recognition of LTA involves also LPS-binding protein (LBP) and CD14. InvivoGen provides LTA from S. aureus (LTA-SA) and a purified form of LTA-SA, which is EndoFit™ (<0.001 EU/µg). Specificity: TLR2 agonist LTA-SA Working concentration: 100 ng -1 μg/ml Endotoxin level: 10 EU/mg LTA-SA Purified Working concentration: 1 ng -1 μg/ml Endotoxin level: EndoFit™