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Structural comparison between HsDNAligI and AtDNligI. (A) AtDNAligI has a shorter N-terminal region. However, the core structure that harbors the DNA binding domain (red) the adenylation domain (cyan) and the OB-fold domain (orange) are conserved between both ligases. (B) Homology modeling of AtDNAlig I with basis on the crystal structure of human DNA ligase I (PDB ID: 1X9N).
