Rabbit polyclonal antibody against a synthetic peptide corresponding to residues 324–340 of human STING was obtained from EvoQuest Custom Antibody Services (Invitrogen, CA). Other antibodies were obtained from following sources: SEC61β (Upstate, NY), β-Actin, HA, FLAG (Sigma, MO), COX IV, Calreticulin, IRF3 and RIG-I (Abcam, MA).