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Fig. 4 | BMC Biology

Fig. 4

From: Splendor and misery of adaptation, or the importance of neutral null for understanding evolution

Fig. 4

The routes of exaptation. The cartoon schematically shows two types of evolutionary events: exaptation of a function-less transcript that becomes, for example, a lncRNA and exaptation of a MGE that becomes, after transposition, a regulatory region of a pre-existing gene. The thickness of the arrows denotes the increase in expression level that is assumed to occur after exaptation

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