To evaluate the functional roles of these JAK-STAT regulated S1A family members in fly cellular immunity, we used two different RNAi lines with unique sequence targets to knock down each gene in both the plasmatocyte (using eater-GAL4) (Tokusumi et al. 2009a) and lamellocyte (using msn-GAL4) (Lam, et al. 2010; Tokusumi et al. 2009b) immune cell types and compared their ability to encapsulate parasitoid wasp eggs following infection. Here, LGALS4 is linked to infection.