Predicted to enable glutamate receptor activity; identical protein binding activity; and transmitter-gated ion channel activity involved in regulation of postsynaptic membrane potential. Involved in social behavior. Located in glutamatergic synapse. Is integral component of postsynaptic density membrane. Is expressed in several structures, including alimentary system; brain; liver and biliary system; reproductive system; and spinal cord. Orthologous to human GRID1 (glutamate ionotropic receptor delta type subunit 1). [provided by Alliance of Genome Resources, Apr 2022]