Receptor References Location Agonist Adapter Human lymphocytes
TLR1 [11-13] Cell surface Bacterial lipoproteins MyD88 Monocytes
  [14,15] Intracellular Lipopeptides Tirap B cells
          MDCs
TLR2 [11,12,16] Cell surface Peptidoglycan MyD88 Monocytes
  [17] Intracellular Lipoteichoic acid Tirap Macrophages
      Lipoarabinomannan   MDCs
      Lipoprotein    
TLR3 [11,12,18] Intracellular Double-stranded RNA TRIF NK cells
      Poly I:C TRAM MDCs
TLR4 [11,12,16] Cell surface Lipopolysaccharide (LPS) MyD88 Monocytes
  [19,20]     Tirap Macrophages
        TRIF
TRAM
MDCs
TLR5 [11,16] Cell surface Flagellin MyD88 Monocytes
          Macrophages
          MDCs
TLR6 [11,21] Cell surface MALP-2 MyD88
Tirap
MDCs
      Mycoplasmal   B cells
      Soluble tuberculosis factor (STF)    
      Phenol-soluble modulin (PSM)    
      Diacyllipopeptides    
TLR7 [1,4,11] Intracellular Single-stranded RNA MyD88 pDCs
  [15,22,23]   Loxoribine   B cells
  [24,25]   Imidazoquinoline    
      Bropirimine    
TLR8 [1,11,26] Intracellular Single-stranded RNA MyD88 Monocytes
  [27,28]       Macrophages
          MDCs
TLR9 [1,11,25] Intracellular Unmethylated CpG ODNs MyD88 pDCs
  [29]   Membrane microparticles   B cells
TLR10 [11,30] Intracellular Pam(3) CSK(4) MyD88 B cells
Table 1: 10 TLRs in human.