INTRODUCTION .......................................................................... DNA SUPERCOILING AND TOPOISOMERASES ............................................. CONTROL OF TOPOISOMERASE GENE EXPRESSION ...................................... ROLE OF TOPOISOMERASES AND SUPERCOILING IN DNA REPLICATION................. Elongation Phase of Replication ..........................................

1 Department of Electrical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea; [email protected] (D.K.); [email protected] (M.P.) 2 Department of Creative IT Excellence Engineering and Future IT Innovation Laboratory, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea; [email protected] * Corres...

4108 | CrystEngComm, 2014, 16, 4108–4112 This journal is © The R Department of Materials Science and Engineering and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, South Korea. E-mail: [email protected]; Fax: +82 54 279 5242; Tel: +82 54 279 2152 † Present Address: Max-Planck-Institut Für Biophysikalische Chemie, am Fassberg 11,...

Preliminary results of a systematic study on the simultaneous optical-to-X-rays variability in blazars are presented. Data from Swift observations of four bright γ−ray blazars (3C 279, ON +231, S5 0716+71, PKS 2155−304) have been analyzed, compared, and discussed. Specifically, 3C 279 shows a variable flattening in the low energy part of the X-ray spectrum that appears to be confined in a speci...

Abbâsî halifesi Mu‘tazıd-Billâh’ın devletin merkezini 279 (892) yılında yeniden Bağdat’a taşımasının ardından yaşanan siyasî, idarî ve iktisâdî toparlanma süreci kısa sürmüştü. Muktedir-Billâh’ın erken yaşta halife olması siyasî çekişmeler, Bağdat’ın 334 (945) Büveyhîler’in eline düşmesine neden olmuştu. Bu yazı, Adan Jarso Golole’nin 2021 Büveyhî Hakimiyetine Giden Süreçte Bağdat’ta Siyâsî, İk...

86 GHz Very Long Baseline Polarimetry probes magnetic field structures within the cores of Active Galactic Nuclei at higher angular resolutions and a spectral octave higher than previously achievable. Observations of 3C 273 and 3C 279 taken in April 2000 with the Coordinated Millimeter VLBI Array have resulted in the first total intensity (Stokes I) and linear polarization VLBI images reported ...

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clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles ): January 10, 2012 www.sciencemag.org (this infomation is current as of The following resources related to this article are avai...