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Thiago M Venancio*, S Balaji, Lakshminarayan M Iyer and L Aravind*
* Corresponding authors: Thiago M Venancio venancit@ncbi.nlm.nih.gov - L Aravind aravind@ncbi.nlm.nih.gov
Genome Biology 2009, 10:R33 doi:10.1186/gb-2009-10-3-r33