A compound attribute that is the ratio of amount of CD99 antigen-like protein 2 (human) in blood to amount of proprotein convertase subtilisin/kexin type 9 (human) in blood. The trait is OBA_2053397 (CD99L2/PCSK9 protein level ratio in blood). Also known as: the ratio of amount of CD99 antigen-like protein 2 (human) in blood to amount of proprotein convertase subtilisin/kexin type 9 (human) in blood.