Contains a genomic fragment from the tin locus, which includes the A (pharynx) and B (early pan-mesodermal) enhancers, but does not include the C (cardioblast) or D (dorsal mesoderm) enhancers.
tinAB partially rescues Df(3R)GC14
tin- embryos (Df(3L)GC14 homozygotes) expressing tinAB can specify progenitors of all derivatives of the dorsal mesoderm (as assayed by marker gene expression). At later stages, cardioblasts and all types of pericardial cells are present in these embryos, although the dorsal vessel appears discontinuous, the arrangement of cardioblasts and pericardial cells is irregular and lymph gland formation is impaired.