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. 2009 May 28;4(5):e5690. doi: 10.1371/journal.pone.0005690

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Campbell et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Lavender: nucleotide in upper partner's sequences shared with lower partner's sequences. Purple: nucleotide in lower partner's sequences shared with upper partner's sequences. Yellow: gap.