Genomic fragment of Csam\nos spanning the regulatory and coding regions.
Only trace levels of RNA are found by in situ hybridisation in transgenic D.melanogaster embryos as the regulatory elements have so diverged they are unable to function in D.melanogaster.
Only trace levels of RNA are found by in situ hybridisation in transgenic D.melanogaster embryos as the regulatory elements have so diverged they are unable to function in D.melanogaster.