TLR2 and infection: Infection of the cells for 2 h with either the wild-type or LOS mutant strains was accompanied by a significant increase in TLR2 expression—MFI = 195 ± 28 (wild-type), 178 ± 30 (ΔMMAR_2321), 198 ± 17 (ΔMMAR_2331), 184 ± 9 (∆MMAR_2349), 211 ± 21 (MMAR_2343::Tn).