8kb of genomic sequence upstream of the Gαq coding region (including the initiator Met and the first 10 amino acids) are fused in frame to lacZ tagged with a Tag:NLS(SV40-largeT) nuclear localization signal.
EcollacZ expression is detected in the retina, antennae, maxillary palps, proboscis, lamina, epithelial cells of the gut, some thoracic neurons, and scattered cells throughout the central nervous system.