This hormone, released from cells in the corpora cardiaca, causes release of diglycerides from the fat body and stimulation of muscles to use these diglycerides as an energy source during energy-demanding processes. Expressed in antennal lobe (AL), corpora cardiaca (CC), corpora allata (CA) and gnathal ganglion (GNG) (at protein level). Expression in CC and CA detected in all animals, expression in GNG in some animals and in AL in few animals (at protein level). Belongs to the AKH/HRTH/RPCH family. The mature peptide AKH-1 is also encoded by another precursor (AC C0HL91). Further mature peptides might exist.