Nested elements. A tandem orientation P{wd19.3} derivative with three copies of the 3.44kb w 5' sequence is inserted into the w coding region of another P{wd19.3} derivative with three copies of the 3.44kb w 5' sequence. One of the two is deleted for 1.4kb from the 3' end.
construct_comment: Consists of nested modified elements derived from P{wdl9.3} and inserted in same orientation; nested element P{X98b} and composite element P{wd19.3+X98} share a common P3\' end.