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Conservative residues derived from sequence comparison of 50 members of the PhoU family that share the PhoU-PhoU domain structure. Residues marked in red are 100% conserved, the green residues are common in 90% of the sequences, the blue color corresponds to 80% conservation, and the purple color corresponds to 70% conservation. The amino acids with less than 100% conservation are not necessarily the ones that appear in the PHOU_AQUAE sequence.
