Comment on

• Replication fork reactivation downstream of a blocked nascent leading strand.

  Heller RC, Marians KJ. Heller RC, et al. Nature. 2006 Feb 2;439(7076):557-62. doi: 10.1038/nature04329. Nature. 2006. PMID: 16452972
• The mechanism of DNA replication primer synthesis by RNA polymerase.

  Zenkin N, Naryshkina T, Kuznedelov K, Severinov K. Zenkin N, et al. Nature. 2006 Feb 2;439(7076):617-20. doi: 10.1038/nature04337. Nature. 2006. PMID: 16452982
• DNA primase acts as a molecular brake in DNA replication.

  Lee JB, Hite RK, Hamdan SM, Xie XS, Richardson CC, van Oijen AM. Lee JB, et al. Nature. 2006 Feb 2;439(7076):621-4. doi: 10.1038/nature04317. Nature. 2006. PMID: 16452983