Sequence of the API2-MLT chimeric cDNA. The 5′API2 cDNA sequence (bp 1-1446 according to GenBank Accession No. L49432) is shown in italic, the additional 582 bp of MLT fused to API2 in case 2 are shown in bold. The inframe API2-MLT fusion generates at bp 1446-1448 an AAT (N) for case 1, an AGA (R) in case 2. The three BIR domains of API2 and the two Ig-like C2 domains (Ig-I C2) and the domain similar to a mouse Ig γ chain (VDJ4, GenBank Accession No.M13070) of MLT are underlined. The sequence has been deposited in GenBank under Accession No. AF123094.