organism: Mus musculus
attributes.tag: source_name
attributes.value: progenitor B cells
attributes.tag: strain
attributes.value: C57BL/6
attributes.tag: cell type
attributes.value: progenitor B cells
attributes.tag: tissue
attributes.value: Bone marrow
attributes.tag: genotype
attributes.value: Rag2-/- cultured in vitro
attributes.tag: treatment
attributes.value: Primary pro-B cells by CD19+ selection, cultured with IL-7
attributes.tag: geo_loc_name
attributes.value: missing
attributes.tag: collection_date
attributes.value: missing