The renaturation kinetics of labeled DNA derived from synchronized Chinese hamster cells indicate that the three classes of repetitious DNA replicate uniformly throughout the S period, and that a piece of repetitious DNA may occur at or near the beginning of each replicon. Studies with mouse-cell DNA suggest that mouse satellite DNA replicates when euchromatin replicates.

Large numbers of guanine-rich sequences with potential to form G-quadruplexes have been identified in genomes of various organisms. Such sequences are constrained at both ends by long DNA duplex with a complementary strand in close proximity to compete for duplex formation. G-quadruplex/duplex competition in long double-stranded DNA has rarely been studied. In this work, we used DMS footprintin...

By an improved method of hydroxylapatite chromatography, the reassociated sequences of chick nuclear DNA were isolated, and their base composition analysed. By increasing the amount of reassociation, the G + C content of the renatured sequences decreased progressively to reach a mean value corresponding to that of the total DNA. In order to study the distribution of the families, or group of fa...

Le bassin industriel franco-belge est un terrain d’étude des mutations paysages postindustriels. La recherche, qui s’inscrit dans une approche multidisciplinaire du sol, s’intéresse aux projets de requalification friches industrielles intègrent les techniques remédiation environnementale au projet paysage. Dans ce cadre, le site dénommé Produits chimiques Ugine Kuhlmann (PCUK), sein territoire ...