Ontology of Biological Attributes identifier OBA_2042450 (level of 5-formyltetrahydrofolate cyclo-ligase MTHFS in blood serum) is the amount of a 5-formyltetrahydrofolate cyclo-ligase MTHFS when measured in blood serum. Also known as: blood serum 5-formyltetrahydrofolate cyclo-ligase MTHFS amount.