O sperm nuclei glutathione peroxidase snGPx phospholipid hydroperoxide glutathione peroxidase MGI:104767 Gene glutathione peroxidase 4 PHGPx http://identifiers.org/mgd/MGI:104767 mtPHGPx genetic mapping protein coding gene Gpx4 + PHGPx|snGPx|phospholipid hydroperoxide glutathione peroxidase|sperm nuclei glutathione peroxidase|mtPHGPx