Interleukin-7 expanded bone marrow cells from anti-HEL immunoglobulin transgenic mice were sorted by FACS for surface IgM high, IgDneg-low expression. The U74Av1 probe arrays were subjected to U74A mask corrections, and all target hybridization intensities were scaled to 1500 arbitrary units using Microarray Suite 5.0 (Affymetrix). (Tze etal. Public Library of Science Biology, In Press 2005) Raw data obtained from Affymetrix Suite 5.0 program with all arrays subjected to MG-U74A mask corrections and scaling to taget intensity of '1500'. Listed are all probe sets excluding masked probe sets and Affymetrix hybridization control probe sets. Keywords = bone marrow B cells