blood protein amount blood alpha-fetoprotein amount Trait.ontology VT:0010776 The proportion, quantity, or volume in whole blood, serum, or plasma of the highly abundant plasma protein produced by the yolk sac, liver, and gastrointestinal tract during fetal life and by certain neoplasms in the adult. caripark 2018-06-12T09:38:14Z EFO:0010583