Lk

Drosophila melanogaster

Leucokinin (Lk) encodes a neuropeptide that regulates water balance and food intake. Three groups of leucokinergic neurons are identified in the brain and abdominal ganglion of larvae and adults. Serotonin and insulin peptides have receptors in the abdominal leucokinergic neurons.

Lkr

Drosophila melanogaster

Leucokinin receptor (Lkr) encodes a 7-transmembrane domain G-protein-coupled receptor (GPCR) with the product of Lk as a ligand. It signals through intracellular calcium, and is implicated in ion regulation by the Malpighian tubules and in feeding control.