attributes.tag: source_name
attributes.value: NP+IgDlowB220+ pre-GC B cells
attributes.tag: strain
attributes.value: C57BL/6
attributes.tag: tissue
attributes.value: lymph nodes
attributes.tag: cell type
attributes.value: NP+IgDlowB220+ pre-GC B cells
attributes.tag: treatment
attributes.value: helped by CD4-Cre OT-II T cells
attributes.tag: time
attributes.value: 3 days after activation in vivo by NP-OVA immunization