The amount of a deoxyuridine 5'-triphosphate nucleotidohydrolase, mitochondrial when measured in blood serum. The trait is OBA_2041390 (level of deoxyuridine 5'-triphosphate nucleotidohydrolase, mitochondrial in blood serum). Also known as: blood serum deoxyuridine 5'-triphosphate nucleotidohydrolase, mitochondrial amount.