Fig. 9.
TCR rearrangements in the tumor cell lines. Southern blot analysis of tumor cell lines from groups A, B, C, and D was performed. Genomic DNA from each of the cell lines was cut to completion withHindIII, and analyzed by Southern blotting using a probe specific for TCR Cβ1 and Cβ2. Note that the cell lines in group A have a germline configuration of Cβ2, while those in groups B, C, and D have an altered or absent Cβ2 band, indicating that clonal rearrangement of the TCR has occurred. RW-4 (lane 7) represents DNA from an embryonic stem cell line with germline configurations of Cβ1 and Cβ2.