Mitochondrial Dna Depletion Syndrome 12b is related to mitochondrial dna depletion syndrome 12b , autosomal recessive and familial isolated restrictive cardiomyopathy. An important gene associated with Mitochondrial Dna Depletion Syndrome 12b is SLC25A4 (Solute Carrier Family 25 Member 4), and among its related pathways/superpathways are Signal Transduction and ERK Signaling. Related phenotypes are muscle and growth/size/body region