NheI fragment from positions +295 to +512 of the 5' region of the Fex element is fused upstream of a lacZ reporter.
Expression sensitive to position effect; only expression in amnioserosa observed in all transformant lines. Unlike wild-type F-element transcripts, no expression observed in blastoderm, CNS, or germ line.
construct_comment: Progenitors are those of the plasmid.