organism: Mus musculus
attributes.tag: specific_host
attributes.value: C57BL/6
attributes.tag: age
attributes.value: 6-13 weeks
attributes.tag: body_site
attributes.value: bone marrow
attributes.tag: cell_type
attributes.value: B-cells
attributes.tag: dev_stage
attributes.value: pro and pre-B cells
attributes.tag: genotype
attributes.value: Rag1-/-/Vh81xTg background: Btk-/-, Slp65-/-, Btk;Slp65-/- pre-B cells. Rag1-/- pro-B cells
attributes.tag: strain
attributes.value: C57BL/6