Ontology of Biological Attributes id OBA_2053649 (AHCY/FADD protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of adenosylhomocysteinase (human) in blood to amount of FAS-associated death domain protein (human) in blood. Also known as: the ratio of amount of adenosylhomocysteinase (human) in blood to amount of FAS-associated death domain protein (human) in blood.