Figure 2.
The genetic interaction of hsf with Trl is critical for tll repression and activation. Embryos from females of w1118 (A–C), hsf1/+ (D–F), TrlDHΔ34/+ (G–I) and hsf1/+; TrlDHΔ34/+ (J–L) crossed with G11 males were used to determine the tll expression patterns (A, B, D, E, G, H, J and K) and lacZ (C, F, I and L) using in situ hybridization with digoxigenin-labeled antisense tll and lacZ RNA, respectively. Expression patterns at either late stage 4 or early stage 5 are indicated by stage 4 and 5. Genotypes of females are shown to the left. Embryos are arranged in a sagittal view, with the anterior towards the left.