Figure 4.
Inhibition of Notch signaling affects VDJβ but not DJβ rearrangements. Southern blots are shown of the products of PCR performed on cell lysates of control or DAPT-treated FTOCs, which were originally seeded with CD34+CD1- human thymic progenitor cells and were cultured for 20 days. DJβ (left) and VDJβ (right) rearrangements are shown for undiluted and 1:3 dilutions of the PCR products. Lanes 1 to 3 represent samples from untreated FTOC or FTOC in the presence of 2 or 5 μM DAPT, respectively.