The amount of a tumor necrosis factor ligand superfamily member 6 isoform FasL soluble form when measured in anatomical entity. The trait is tumor necrosis factor ligand superfamily member 6 isoform FasL soluble form amount (Ontology of Biological Attributes term OBA_2050314). Also known as: anatomical entity tumor necrosis factor ligand superfamily member 6 isoform FasL soluble form amount.