Disturbed expression of B lineage–specific and B lineage–inappropriate genes in p100^−/− bone marrow. (A) Quantitative real-time PCR (qRT-PCR) analysis of B-lineage transcription factors in sorted B220⁺CD19⁻DX5⁻Ly6C⁻ B-cell precursors from wild-type, p100^−/−, and p100^−/−relB^−/+ bone marrow. (B) qRT-PCR analysis for expression of B lineage–specific and B lineage–inappropriate genes in sorted wild-type and p100^−/− B220⁺CD19⁻DX5⁻Ly6C⁻ B-cell precursors.