Figure 1.

Generation of the NK2 message. (A) A schematic comparison of hepatocyte growth factor (HGF) genes. Bars and numbers indicate exons. The alternative exon used for NK2 splicing is indicated by a triangle at the corresponding introns. The murine intron does not contain this alternative exon; (B) The exon (capital letters)–intron (small letters) boundary sequences for NK2 splicing. Predicted splice donor and acceptor sites are underlined. The murine sequence lacks characteristics commonly found in splice acceptor sites. The carboxy-terminal amino acids of NK2 and the stop codon (*) are shown below the coding sequence.