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. 2019 Oct 18;10:2458. doi: 10.3389/fimmu.2019.02458

Figure 1.

Figure 1

Human B cell ontogeny. Illustration of the current understanding of B cell ontogeny in human B cells from late bone marrow (pro- and pre-B cells) through peripheral activation pathways, and into antibody secreting cells (ASC)/long-lived plasma cells compartments (PC). (→) Denotes clear literature supported associations, whereas (- - - >) represent associations which are theoretical but have literature supported plausibility. T1, transitional type 1 B cells; T2, transitional type 2 B cells; T3, transitional type 3 B cells; MZP, marginal zone precursor B cells; DN1, double-negative (IgD– CD27–)−1 B cells; DN2, double-negative (IgD– CD27–)−2 B cells; GC, germinal center; FDC, follicular dendritic cell.