Immunity component of one of 6 LXG toxin-immunity modules in this strain. They promote kin selection, mediate competition in biofilms, and drive spatial segregation of different strains, indicating that LXG toxins may help avoid warfare between strains in biofilms. Mediates intercellular competition during biofilm formation; disruption of the operon disadvantages the bacteria, but overexpression of the cognate immunity protein restores growth in competition with wild-type. In situ neutralizes the toxic effect of cognate toxin YeeF (PubMed:34280190). Probably neutralizes the ability to inhibit growth of cognate toxin YeeF. Probably does not have immunity protein activity on other LXG toxins (Probable). Interacts with cognate toxin YeeF but not with non-cognate toxin YobL. The interaction probably inhibits the toxic activity of YeeF (PubMed:22200572). May bind with a stoichiometry of 2:2 to YeeF (By similarity). Expressed on rich and minimal solid media likely in early stationary phase; dependent on DegSU. Not expressed in liquid LB, but only under conditions that promote biofilm formation. Deletion of the yeeF-yezG operon has no visible growth phenotype, however it is out-competed by wild-type cells. Extended N-terminus.