KEGG pathway enrichment suggests that genes coexpressed with RPL4P4 participate in neuroactive ligand-receptor interactions, alcoholism, neutrophil extracellular trap formation, nicotine addiction, morphine addiction, GABAergic synapses, EMC-receptor interactions, retrograde endocannabinoid signaling, and calcium signaling pathways (Figures 4(f) and 4(g)). Here, RPL4P4 is linked to nicotine dependence.