organism: Rattus norvegicus
attributes.tag: strain
attributes.value: Hsd Sprague Dawley
attributes.tag: age
attributes.value: 100-155 day-old
attributes.tag: collection_date
attributes.value: 2020
attributes.tag: geo_loc_name
attributes.value: USA: Boston, MA
attributes.tag: sex
attributes.value: female
attributes.tag: tissue
attributes.value: mammary tissue
attributes.tag: biomaterial_provider
attributes.value: Kornelia Polyak Laboratory
attributes.tag: breeding_history
attributes.value: Outbred
attributes.tag: phenotype
attributes.value: Untreated rat mammary gland #3-Epithelium
attributes.tag: treatment
attributes.value: ddH2O (pH6)
attributes.tag: BioSampleModel
attributes.value: Model organism or animal