Transcriptional analysis of Gata3^−/− DN2 T-cell progenitors. (A-D) Quantitative RT-PCR for the indicated genes in sorted DN2 populations from Gata3^+/− and Gata3^−/− OP9Δ1 cultures is shown as expression levels relative to glyceraldehyde-3-phosphate dehydrogenase expression levels. *P < .05; ***P < .001.