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The stimulator of interferon genes (STING;also known as TMEM173, MPYS, MITA and ERIS) is a critical signaling molecule in innate immune response to cytosolic nucleic-acid ligands.STING responds to the cytosolic presence of dsDNA and cyclic-dinucleotides by relocalizing to discrete foci from endoplasmic reticulum in the cell cytoplasm.This relocalization is associated with recruitment and activation of the kinase TBK1, which phosphorylates IRF3, leading to induction of type I interferon expression.