This neurotransmitter peptide increases outward K+ currents and promotes dephosphorylation of many phosphoproteins in Aplysia sensory neurons. It is a potent cardioactive neuropeptide in Lymnaea stagnalis.
Ref: Jacob, TC. and JM. Kaplan, J. Neurosci. 23, 2122 (2003); Madrid, K. et al. Peptides 15, 31 (1994); Linacre, A. et al. J. Neurosci. 10, 412 (1990).