The amount of a kynurenine/alpha-aminoadipate aminotransferase, mitochondrial when measured in blood serum. The trait is level of kynurenine/alpha-aminoadipate aminotransferase, mitochondrial in blood serum (OBA_2040454, an Ontology of Biological Attributes term). Also known as: blood serum kynurenine/alpha-aminoadipate aminotransferase, mitochondrial amount.