Figure 4.
Map of the omb locus. The genetic map of omb is redrawn from ref. 33. l(1)biD4 and l(1)omb3198 are two point mutations causing premature termination of the omb protein (34). Qd1a, Qd1b, and bi indicate insertions found in the Qd and bi mutant chromosome, respectively. OLRs indicate optic lobe regulatory regions defined by the various chromosomal breakpoints. The sites of gypsy insertion in D11 and D13–1 are indicated relative to the promoter.