Once polymerase switching from pol alpha to pol delta is complete the processive synthesis of a short run of DNA called an Okazaki fragment begins. DNA synthesis is discontinuous and as the extending Okazaki fragment reaches the RNA primer, this primer is folded into a single-stranded flap, which is removed by endonucleases. The process of extension is completed by the ligation of adjacent Okazaki fragments.
Stillman, B, Tsurimoto, T
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