DLG2 (Discs Large Homolog 2) is a gene that encodes a protein from the membrane-associated guanylate kinase (MAGUK) family, which is important for synaptic assembly and function. This protein plays a key role in the nervous system by supporting synaptic plasticity and neuronal signaling. Changes in DLG2 have been associated with neurological disorders, highlighting its importance in brain development and function.