FAT1 and infection: With the exception of lys-7, the mRNA levels of all the genes that were constitutively expressed at lower levels in uninfected fat-3(wa22) animals were indistinguishable from wild-type following P. aeruginosa infection (Figure 4B, Table S1), indicating that, at the level of gene expression, the ability of fat-3(wa22) mutants to respond to infection remained largely intact.