This modulatory neuropeptide has been colocalized with the small cardioactive peptides A and B to a single cholinergic motor neuron of Aplysia californica. Unlike the small cardioactive peptides, it seems to act presynaptically on the nerve terminals to inhibit acetylcholine release. Cropper, EC; et al., Proc. Natl. Acad. Sci. USA, 85, 6177, (1988).
M.W.: 1053.2
