Abstract We study the non-equlibrium dynamics of an electronic model of competition between an unconventional charge density wave (a bond density wave) and d-wave superconductivity. In a time-dependent HartreeFock+BCS approximation, the dynamics reduces to the equations of motion of operators realizing the generators of SU(4) at each pair of momenta, (k, k), in the Brillouin zone. We also study...

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* This investigation was aided by grants in aid from the U.S. Public Health Service, National Science Foundation, and the Office of Naval Research. 1 Volkin, E., and L. Astrachan, Virology, 2, 149 (1956). 2 Volkin, E., these PROCEEDINGS, 46, 1336 (1960). 3Nomura, M., B. D. Hall, and S. Spiegelman, J. Mol. Biol., 2, 306 (1960). 4Marmur, J., and I). Lane, these PROCEEDINGS, 46, 453 (1960). 5 Doty...

We have determined the DNA sequence of the transposable element Ty912 of yeast. The 5918-base-pair element encodes two genes, tya912 and tyb912, which specify proteins similar to sequence-specific DNA-binding proteins of Escherichia coli and retroviral reverse transcriptases, respectively. The tyb912 gene is atypical of eukaryotic genes since (i) it begins 1336 nucleotides into the Ty912 mRNA (...