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Maximum-likelihood distance tree based on sequence alignment of SMc02977 sequence (bootstrap value >700). Bootstrap values (as percentage) are shown to indicate the level of support for the different parts of the tree topology shown. Black triangle indicates the position of the GCHII/RibA clade. White arrow indicates the position of SMc02977. Black arrows indicate the proteins used in the complementation analysis. GCHII, GCHIII, GTP cyclohydrolase II.
