Ontology of Biological Attributes id OBA_2045204 (level of Cer(m18:1(4E)/24:1(15Z)) in blood serum) is the amount of a n-(15z-tetracosenoyl)-1-deoxysphing-4-enine when measured in blood serum. Also known as: blood serum n-(15z-tetracosenoyl)-1-deoxysphing-4-enine amount.