MGSSHHHHHHSSGLVPRGSHMKMIIAIVQDQDSQELADQLVKNNFRATKLATTGGFLRAGNTTFLCGVNDDRVDEILSVINQTCGNREQLVSPITPMGGSADSYIPYPVEVEVGGATVFVMPVDAFHQF
Cyclic-di-AMP receptor. The protein construct contains an additional 20 non-native amino acids at the N-terminus, including a polyhistidine tag (MGSSHHHHHHSSGLVPRGSH).