A compound attribute that is the ratio of amount of C-type lectin domain family 1 member B (human) in blood to amount of plexin-A4 (human) in blood. The trait is CLEC1B/PLXNA4 protein level ratio in blood (OBA_2055026, an Ontology of Biological Attributes id). Also known as: the ratio of amount of C-type lectin domain family 1 member B (human) in blood to amount of plexin-A4 (human) in blood.