Transcriptome analysis of FCRL4+ and FCRL4− BMem cells. The transcripts differentially expressed by FCRL4+ and FCRL4− BMem from three independent tonsillar cell preparations are displayed. Up- and down-regulated transcripts are indicated in red and green, respectively. The magnitude of expression is depicted by the color bar. Arrowheads indicate transcripts whose expression was validated by quantitative RT-PCR and/or by FACS analysis of other tonsillar samples.