Rel expression of exon 3-4 Rel. expression of exon 1a 7 6 Rel. expression of exon 1b 7 6 3 2 1 0 1 2 3 4 5 6 7 8 9 10 5 4 3 2 1 0 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Rel. expression of exon 1f 4 Rel. expression of exon 1e 5 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10