Predicted to enable carbohydrate binding activity and metal ion binding activity. Acts upstream of or within associative learning. Predicted to be located in extracellular region. Predicted to be active in glutamatergic synapse. Is expressed in embryo; gut endoderm; and heart. Orthologous to human NPTX2 (neuronal pentraxin 2). [provided by Alliance of Genome Resources, Apr 2022]