A compound attribute that is the ratio of amount of linker for activation of T-cells family member 1 (human) in blood to amount of tyrosine-protein kinase Lyn (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054938 (LAT/LYN protein level ratio in blood). Also known as: the ratio of amount of linker for activation of T-cells family member 1 (human) in blood to amount of tyrosine-protein kinase Lyn (human) in blood.