mRNA expression analysis of differentially
amplified fragments. (A) Northern analysis of adult sex and
gut-specific differential display fragments. The female-specific clone
S2 as well as amplicon S1 were hybridized to filters containing RNA
isolated from unfed females (F) and males (M). The gut-specific clones
were hybridized to filters containing RNA from fed (24 h) midguts (G)
and remaining carcasses (C). (B) RT–PCR analysis of gut
specific and blood meal modulated expression, comparing unfed midguts
(UG), carcasses (UC), blood-fed midguts (FG) and carcasses (FC) 22
h postfeeding. cDNA clones are identified on the right margin with
asterisks, indicating those shown in Fig. 3. Levels of ribosomal
protein S7 RNA were used as control. (C) RT–PCR analysis of
G13 mRNA levels in bacterially challenged larvae versus naive larvae at
4, 12, 24, and 30 h following infection. (D) RT–PCR
expression analysis comparing RNA from embryos (E1 = 0–24 h;
E2 = 28–46 h), larvae (L1 = 0–25 h, L4 = 4 days,
L6 = 6 days, L7 = 7 days), pupae (P1 = early and P2
= late), and adult females (A). Ribosomal protein S7 (15) and
cytoskeletal actin (16) mRNA levels were used as controls.