Figure 5. Testing the central 392-bp HpaI–NdeI part of scs (scsm) inserted in either (A) direct or (B) reverse orientation for the ability to terminate transcription in the eyes.
The UAS promoter is shown as the white rectangle marked “UAS.” “+GAL4” indicates that eye phenotypes in transgenic lines were examined after induction of GAL4 expression. In this case, N is the number of lines in which flies acquired a new w phenotype upon induction of GAL4. For other designations, see Figures 1 and 2.