A compound attribute that is the ratio of level of MHC class I polypeptide-related sequence B in blood to amount of angiopoietin-1 receptor (human) in blood. The trait is OBA_2054455 (MICB/TEK protein level ratio in blood). Also known as: the ratio of level of MHC class I polypeptide-related sequence B in blood to amount of angiopoietin-1 receptor (human) in blood.