Generation of peripheral B cells occurs via two spatially and temporally distinct pathways.

Abstract excerpt

We have identified a population of newly formed bone marrow (BM) B cells that shares multiple characteristics with late transitional B cells in the spleen. Both late splenic transitional B cells and cells within this uncharacterized BM population expressed the cell-surface phenotype AA4(+) CD23(+), yet the developmental kinetics and the renewal rate of AA4(+) CD23(+) BM B cells mirrored recently formed BM B...

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