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Summary of TLR ligands and their origins.
| Ligand | Origin of the ligand | |
|---|---|---|
| TLR1 | Lipoprotein | Bacteria (Gram positive) |
| TLR2 | Triacyl lipoprotein | Bacteria (Gram positive) |
| TLR3 | Double stranded RNA | Viruses |
| TLR4 | LPS | Bacteria (gram negative) |
| TLR5 | Flagellin | Bacteria |
| TLR6 | Diacyl lipoprotein | Bacteria (gram positive) |
| TLR7 | Single stranded RNA | Viruses & bacteria |
| TLR8 | Single stranded RNA | Viruses & bacteria |
| TLR9 | Unmethylated CpG DNA |
Viruses & bacteria |
