Ontology of Biological Attributes entry OBA_2053099 (STX4/TBC1D23 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of syntaxin-4 (human) in blood to amount of TBC1 domain family member 23 (human) in blood. Also known as: the ratio of amount of syntaxin-4 (human) in blood to amount of TBC1 domain family member 23 (human) in blood.