FIG. 6.

Translation products from the DR region are expressed in vivo. (A) Structure of λ-ZAP BCBL-1 cDNA expression clones 23 and 24 showing fusion of lacZ coding sequence to DR1 sequences in reading frames 1 and 2, respectively. Both clones were identified with MAb 5B2. (B) Western blot with MAb 5B2 of TPA-induced BCBL-1 (Bcbl) and BJAB (BJ) cell lysates. Microliter amounts of loaded lysates are indicated; two loads of BCBL-1 lysate are shown to allow an estimation of relative abundance of translated products. The arrow indicates the predominant 48-kDa protein in BCBL-1 cells.