The amount of a N-(3E-hexadecenoyl)-deoxysphing-4-enine-1-sulfonate when measured in blood serum. The trait is Ontology of Biological Attributes term OBA_2045043 (level of N-(3E-hexadecenoyl)-deoxysphing-4-enine-1-sulfonate in blood serum). Also known as: blood serum N-(3E-hexadecenoyl)-deoxysphing-4-enine-1-sulfonate amount.