CDKN2D/TBC1D23 protein level ratio in blood (OBA_2054237) can be described as follows. A compound attribute that is the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of TBC1 domain family member 23 (human) in blood. Also known as: the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of TBC1 domain family member 23 (human) in blood.