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B-cell progenitor alterations associated with Rybp inactivation are independent of Ring1A, Ring1B, and Ink4a loci. (Left) Representative flow cytometry plots of CD19- and B220-labeled lineage-depleted (except for B220) bone marrow cells from mice of the indicated genotypes. (Right) Absolute number of populations containing B-1P and pre-proB progenitors. Values are means and SD from three mice per genotype.
