PCDH20 (Protocadherin 20): PCDH20 is a member of the protocadherin family, a group of proteins involved in cell-to-cell adhesion and signaling, particularly within the nervous system. PCDH20 plays a crucial role in neural development and connectivity, aiding in the formation and maintenance of neural networks. Malfunctions in PCDH20 have been associated with neurodevelopmental disorders and may affect cognitive and sensory functions.