Fig 3. Combinations of unc-68 alternative exons.

(A) Schematic of the unc-68 locus as in Fig 1, with close-up views of the alternative transcription start region (lavender) and of the alternative splicing hot spot in the DR2 coding region (green). The positions of primers used for the alternative exon combination analysis are indicated. (B) Schematic representation and frequency of each of the 16 possible isoforms resulting from the combination of alternative exons 1,10, 12 and 13. Only 6 isoforms were detected.