ftz upstream element and 2.5kb XbaI-SacI spacer element (from the Antp eighth exon) are fused 5' to a minimal Hsp70 promoter driving expression of lacZ.
In germ-band extended embryos, moderate expression in the mesoderm and ectoderm, in even parasegments. In later embryos, expression is not observed in the CNS.
report comment: Contains the ftz "upstream element" enhancer.
construct_comment: One of a series of lacZ reporter constructs designed to characterize the ftz "upstream element" enhancer.