In Escherichia coli, the RuvA, RuvB and RuvC proteins are required for the late stages of homologous recombination and DNA repair. RuvA and RuvB form a complex that interacts with Holliday junctions--crossed DNA structures that are recombination intermediates--and promotes branch migration; RuvC is a junction-specific endonuclease that resolves Holliday junctions and completes the recombination...

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We study the scattering of a moving discrete breather (DB) on a junction in a Fermi-Pasta-Ulam chain consisting of two segments with different masses of the particles. We consider four distinct cases: (i) a light-heavy (abrupt) junction in which the DB impinges on the junction from the segment with lighter mass, (ii) a heavy-light junction, (iii) an up mass ramp in which the mass in the heavier...

Xenopus mRNAs that potentially encode gap junction proteins in the oocyte and early embryo have been identified by low-stringency screening of cDNA libraries with cloned mammalian gap junction cDNAs. The levels of these mRNAs show strikingly different temporal regulation and tissue distribution. Using a nomenclature designed to stress important structural similarities of distinct gap junction g...

In the major pathway of homologous DNA recombination in prokaryotic cells, the Holliday junction intermediate is processed through its association with RuvA, RuvB, and RuvC proteins. Specific binding of the RuvA tetramer to the Holliday junction is required for the RuvB motor protein to be loaded onto the junction DNA, and the RuvAB complex drives the ATP-dependent branch migration. We solved t...