Figure 1.

Intron insertion sites. Insertion sites of introns 714, 723 and 870 found in sponges are denoted by X. The cox 1 sequence of the sponge A. queenslandica was used as reference for numbering positions in the alignment.

Szitenberg et al. BMC Evolutionary Biology 2010 10:288   doi:10.1186/1471-2148-10-288
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