BL2 cells stimulated through αIgM treatment, by CD40L, IL21, BAFF or LPS. RNA was hybridized onto U133A 2.0 plus Arrays. Differentially expressed genes between stimulated and control cells were identified using linear models as implemented in the bioconductor package LIMMA . False discovery rates for lists of differentially expressed genes were calculated according to Benjamini and Hochberg . Genes were ranked according to their p-value for differential expression from the microarray experiments (adj. P value ≤ 0.05).