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Structural organization of AtRecX. (A) Crystal structure of RecX from E. coli (PDB: 3c1d). RecX is composed of three repeats of a three-helix motifs, (B) modular organization of AtRecX in comparison to bacterial RecX. Plant RecX harbor a mitochondrial targeting sequence (MTS) and a N-terminal domain of unkown function. AtRecX share more than 30% amino acid identity with bacterial RecXs.
