SF3B4/SIRT2 protein level ratio in blood (Ontology of Biological Attributes term OBA_2055640) can be described as follows. A compound attribute that is the ratio of amount of splicing factor 3B subunit 4 (human) in blood to amount of NAD-dependent protein deacetylase sirtuin-2 (human) in blood. Also known as: the ratio of amount of splicing factor 3B subunit 4 (human) in blood to amount of NAD-dependent protein deacetylase sirtuin-2 (human) in blood.