MRPL19 (mitochondrial ribosomal protein L19) is a structural component of the mitochondrial large ribosomal subunit that functions in mitochondrial protein synthesis 1. The gene is located on chromosome 2 and plays a role in mitochondrial translation processes essential for cellular energy production 2. MRPL19 has been implicated in neurodevelopmental disorders, particularly reading disabilities and dyslexia, where it acts as a susceptibility gene within the DYX3 locus 23. The gene shows co-regulated expression with C2ORF3, and carriers of risk haplotypes demonstrate significantly reduced MRPL19 expression compared to non-carriers 2. In autism spectrum disorders, MRPL19 variants are associated with language skill variations, suggesting shared genetic contributions across neurodevelopmental conditions 4. Functionally, MRPL19 appears to contribute to cellular stress responses, as knockout studies demonstrate that MRPL19 inhibition increases cell viability and reduces apoptosis following oxygen-glucose deprivation/reperfusion injury 1. The gene has also been studied in the context of diabetic retinopathy, though with variable association results across populations 5. Additionally, MRPL19 methylation patterns are affected by environmental toxins like methylmercury, suggesting epigenetic regulation mechanisms 6.