Sequence of the V_κ3 gene rearrangement, including part of the promoter region, the leader intron, and part of the constant region. Sequence format is the same as in Fig 6. The sequence obtained from L1236 cells is compared with germline sequences for the corresponding V_κ, J_κ, and C_κ genes (L2,22J_κ1,23 and C_κ24). The aberrant splicing of the leader intron is indicated. The sequence of Jκ1 and Cκ was obtained from cDNA. Therefore, the intron sequence between J_κ1 and C_κ is not given. The J_κ gene is correctly spliced to the Cκ gene. This sequence is available from the EMBL database under accession no.AJ005571.