LRRN2 (Leucine Rich Repeat Neuronal 2): LRRN2 is part of the leucine-rich repeat protein family, which is involved in protein-protein interactions. LRRN2 plays key roles in cell adhesion, signaling, and neuronal development. It is expressed in various regions of the brain and is thought to contribute to the formation of neural circuits and synaptic differentiation. Its role in neural development and plasticity indicates a potential involvement in neurological disorders, although its specific functions are still under investigation.