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Amino acid alignment of six Y-family DNAPs, for which X-ray structures exist, along with EcDNAP IV and EcUmuC, for which modeled structures exist, in a region that includes the B-α-helix (turquoise), C-α-helix (turquoise) and 4-β-strand (yellow). Conserved amino acids are boxed. Note that EcUmuC has an additional two amino acids (R63 and R64) and conforms least to the conserved AKxxCP sequence in this region.
