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MukF winged-helix domain The kicA and kicB genes are found upstream of mukB. It has been suggested that the kicB gene encodes a killing factor and the kicA gene codes for a protein that suppresses the killing function of the kicB gene product. It was also demonstrated that KicA and KicB can function as a post-segregational killing system, when the genes are transferred from the E. coli chromosome onto a plasmid.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",