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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Different alternative splicing patterns are subject to opposite selection pressure for protein reading frame preservation

Figure 1

Two kinds of ASEs analyzed in the study (A) simple ASEs and (B) complex ASEs. Complex ASEs change the boundaries of one or both of their flanking exons when they are included in transcripts while simple ASEs do not. Therefore, a complex ASE looks like a simple ASE plus exon extension/truncation events. The length difference between Transcripts 1 and 2 is d1 + d2 + d3 - d4 - d5.

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