attributes.tag: source_name
attributes.value: liver
attributes.tag: strain
attributes.value: twelve-week-old germ-free mice
attributes.tag: culture environment
attributes.value: Feeding with sterile food and water
attributes.tag: treatment
attributes.value: Gavage with the intestinal contents of normal mice
attributes.tag: replicate
attributes.value: 1
attributes.tag: geo_loc_name
attributes.value: missing
attributes.tag: collection_date
attributes.value: missing