HEK-Blue™ TLR9 cells are designed for studying the stimulation of TLR9 by monitoring the activation of NF-κB and AP-1.
TLR9 is expressed in the endoplasmic reticulum of resting cells in contrast to most TLRs that are located on the plasma membrane . TLR9 recognizes specific unmethylated CpG-ODN sequences, that distinguish bacterial DNA from mammalian DNA. TLR9 engages an intracellular signaling pathway that involves MyD88 leading to NF-κB translocation . TLR9 recognizes different CpG motifs; the optimal sequences being GTCGTT and GACGTT for human TLR9 and murine TLR9 respectively . TLR9 binds directly to CpG DNA and recognizes specifically CpG DNA that is unmethylated and single stranded .
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