May be involved in modulating long-term memory formation and retention, at least with respect to odor-taste associative learning. Secreted to the cell surface, and to the terminals of neurites. Expressed predominantly in cerebral ganglia (at protein level). The mRNA is highly expressed in cerebral ganglia, and is detected at lower levels in visceral-pedal ganglia, head, and body, but is not detected in the tail. Up-regulated in the somata of the procerebral neurons after associative conditioning with paired presentation of a carrot juice odor and an aversive quinidine taste. Belongs to the learning-associated protein family.