Tracking B cells in the periphery of tamoxifen-treated B-Indu-Rag1^fl/fl mice. (A) T1 (IgM^hiIgD^−/loCD21^−/loCD23⁻) and mature (IgM^loIgD^hiCD21⁺CD23⁺) B-cell subsets in the blood of wild-type mice. (B) Percentages of T1 B cells in the blood of induced B-Indu-Rag1^fl/fl (n = 9) and wild-type control (n = 12) mice. (C) Percentages of T1 and mature B cells in the blood of induced B-Indu-Rag1^fl/fl mice. ↑ indicates time points of tamoxifen administration.