WE have formulated a structure for the nucleic acids which is compatible with the main features of the X-ray diagram and with the general principles of molecular structure, and which accounts ...

Nucleic acid unwinding is an essential step in many ... coli involved in repair, function as monomers (PcrA; D. B. Wigley) or as dimers (Rep or UvrD; T. M. Lohman, Washington University).