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dinP | DNA polymerase IV; Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. May be involved in translesional synthesis, in conjunction with the beta clamp from PolIII. (351 aa) | ||||
umuC | Error-prone repair protein; Involved in UV protection and mutation. Essential for induced (or SOS) mutagenesis. May modify the DNA replication machinery to allow bypass synthesis across a damaged template. (422 aa) |