A distal promoter fragment between 8.8 and 6 kb upstream of the srp transcription start site regulates expression of a GAL4 driver.
This driver is expressed in all the embryo-derived hemocytes from the early embryonic stages, as well as in the larval lymph gland and fat body.
ScerGAL4srp.D.cCa drives expression in hemocytes from mid-embryogenesis onward.