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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Some novel intron positions in conserved Drosophila genes are caused by intron sliding or tandem duplication

Figure 2

Apomorphic introns, mapped onto the Drosophila tree. Changed intron positions that could unambiguously be mapped onto a specific branch are denoted by circles. Filled circles indicate intron changes that occurred only once. Two empty circles indicate two independent slidings of a single ancient intron into the same derived position. The tree is scaled according to the DroSpeGe database [21].

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