Structural and Energetic Considerations of Wave Propagation in DNA H. M Sobell, E. D. Lozansky, and M Lessen    11

Gene-V Product of Bacteriophage fd: Structure of a DNA-unwinding Protein and Its Complexes with DNA A. McPherson, F Jumak, A. Wang, F. Kolpak, I. Molineux, and A. Rich    21

DNA: Bihelical Structure, Supercoiling, and Relaxation J. C. Wang    29

DNA Gyrase and DNA Supercoiling M. Gellert, K. Mizuuchi, M. H. O'Dea, H. Ohmori, and J. Tomizawa    35

Structure and Activities of Escherichia coli DNA Gyrase C. L. Peebles, N. P. Higgins, K. N. Kreuzer, A. Morrison, P. O. Brown, A. Sugino, and N. R. Co