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Error-prone DNA polymerase specifically involved in DNA repair. Plays an important role in translesion synthesis, where the normal high-fidelity DNA polymerases cannot proceed and DNA synthesis stalls. Favors Hoogsteen base-pairing in the active site. Inserts the correct base with high-fidelity opposite an adenosine template. Exhibits low fidelity and efficiency opposite a thymidine template, where it will preferentially insert guanosine. May play a role in hypermutation of immunoglobulin genes. Forms a Schiff base with 5'-deoxyribose phosphate at abasic sites, but may not have lyase activity.
DNA polymerase iota; eta2; Poli; polymerase (DNA directed) iota; polymerase (DNA directed), iota; polymerase (DNA) iota; polymerase (DNA-directed), iota; RAD 30B; RAD30; RAD30 homolog B; RAD30B; RAD3OB
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