Comparison of the effects of infection on a deficiency Df(3R)Exe;6209/Tm,Tb line carrying a deletion of sid on one chromosome to a derivative that expresses the sid-RNAi construct (W−/Ubiquitin-GAL4;Df(3R)Exel6209/UAS-sid RNAi) revealed that this sid-RNAi/deficiency line was consistently more susceptible to infection by either bacteria than the deficiency alone or the RNAi expressing lines (Figure 8C and D). This evidence concerns the gene LGALS4 and infection.