In prepararing to analyze a research paper I'll begin posting a series of blog entries that provide mini-tutorials about molecular biological constructs. I'll then link to them in a larger blog entry. This one is focused on DNA helicases. As this link suggests, DNA helicases play a role in the unwinding of DNA which occurs during essential cellular functions like replication, recombination, repair and transcription.
For an easy to read and informative abstract try Unwinding of Unnatural Substrates by a DNA Helicase. Its authors are Alan J. Tackett, Patrick D. Morris, Regina Dennis, Thomas E. Goodwin, and Kevin D. Raney.