The amount of a NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrial when measured in blood serum. The trait is level of NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrial in blood serum (OBA_2042544). Also known as: blood serum NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrial amount.