Fig. 2. Enhancer characterisation of the genomic region responsible for CG11339 expression in endoderm. (A) Scheme of the 100B4-B5 genomic region of CG11339. The two isoforms are indicated, as well as the sequence of the consensus Lab/Exd/Hth-binding site found by in silico approach. Genomic fragments tested for enhancer activities are shown: fragments testing positive are shown in blue. (B) ß-Gal staining in lines carrying the lacZ transgene under the control of the different genomic regions, corresponding to fragments A-E and sub-fragments EI-EVIII derived from fragment E. All embryos are shown for stage 14 of embryogenesis.