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Fig. 1. Alternative splicing of the D. melanogaster myofilin gene. (A) The top line shows the exon-intron organisation of the myofilin gene, which contains nine exons. The start codon (green) is found in exon 2, stop codons (red) are found in exons 5, 8 and 9. Exons 5, 6, and 7 have internal splice sites, alternative versions are indicated by a (upper) and b (lower). (B) Schematic representation of the structure of mRNAs encoded by the myofilin gene. The exons present in the different isoforms DmMf1 to DmMf5 are shown.