Figure 1.

Molecular map of lopo. The gene was mapped within a 3.2-kb genomic XhoI fragment isolated from the P1-phage DS07224 (Hartl et al., 1994). The open reading frame is indicated by the filled box. It starts at the SphI site and is disrupted by three introns. The P-element insertion in lopo¹ is located within the third intron. B, BamHI; E, EcoRI; H, HindIII; S, SphI; X, XhoI.