Ontology of Biological Attributes id OBA_2045146 (level of Phosphatidylethanolamine (O-16:1_22:5) in blood serum) is the amount of a Phosphatidylethanolamine (O-16:1_22:5) when measured in blood serum. Also known as: blood serum Phosphatidylethanolamine (O-16:1_22:5) amount.