TLR4 and infection: Before infection, the expression of Toll-mediated AMPs in the fat body with increased heterochromatin levels showed that Bomanin 1 (BomS1), Drosomycin (Drs), and Daisho1 (Dso1) are upregulated and that Baramicin (Bara) and Daisho2 (Dso2) are downregulated (Additional file 1: Fig. S8A).