A fluorescent transgenic reporter line revealed that
flp-7 is expressed in a few pairs of head neurons. A
flp-7-rescuing transgene under the control of its own promoter showed vivid expression in a few pairs of head neurons (but not in the intestine, the muscles or the hypodermis) and fully restored 5-HT-induced fat loss in the intestine. Reproducible
flp-7 expression was observed in the ALA and the AVG interneurons and in the ASI sensory neurons.