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Alignment of RhtX, the five proteins showing highest homology, and FptX. Similar residues are shaded. Deletions (dashes) are indicated. The accession numbers of the compared proteins are as follows: RhtX (AAK65915), FptX (NP_252908), Rrub1561 (ZP_00014546), All4027 (NP_488065), Y3421 (AAM86970), YPO0772 (CAC89621), Smc02889 (NP_384320), YbtX (CAC90731), AmpG (P36670).
