LRRC4 (Leucine Rich Repeat Containing 4): LRRC4 (Leucine Rich Repeat Containing 4) is a protein primarily expressed in the brain and involved in neural development. It plays a role in nervous system formation, maintenance, and neural cell adhesion and signaling. LRRC4 has been studied in relation to brain tumors, especially gliomas, making it a key focus in neurobiology and cancer research.