LRRTM4 (Leucine-Rich Repeat Transmembrane Neuronal 4): LRRTM4 encodes a transmembrane protein that is primarily expressed in neurons. It plays a crucial role in synaptic transmission and synaptic adhesion. Its presence at synapses and interactions with other synaptic proteins underscore its importance in neural circuitry, neuronal connectivity, and potentially in neurodevelopmental disorders.