Combined Oxidative Phosphorylation Deficiency 39, also known as coxpd39, is related to mitochondrial disease and combined oxidative phosphorylation deficiency 4. An important gene associated with Combined Oxidative Phosphorylation Deficiency 39 is GFM2 (GTP Dependent Ribosome Recycling Factor Mitochondrial 2), and among its related pathways/superpathways are Metabolism of proteins and Peptide chain elongation. Affiliated tissues include brain and cerebellum, and related phenotypes are delayed speech and language development and feeding difficulties in infancy