Figure 1.

Molecular map of the linotte locus. The lio¹ PlacW element is inserted between two transcription units within a 1.6-kb HindIII genomic fragment that contains the transcription start site, first exon, and beginning of the first intron of the lio gene. The extent of the lio² deficiency is represented by the black rectangle. The genomic inserts contained in the P456 and P423 transposons are represented by the black thick lines. P elements maps are not at the scale.