Additional data file 8.
This enzyme is part of the GS/GOGAT pathway, which is involved in the assimilation of NH4+. This tree suggests at least two transfers between clades III and V (represented by WH7803 and WH8102, respectively) and between clades II and X (represented by RS9916 and CC9605, respectively).
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Dufresne et al. Genome Biology 2008 9:R90 doi:10.1186/gb-2008-9-5-r90