منابع مشابه
Unfolding the genomes’ structural secrets
Don't tell anyone but despite all the razzmatazz the human genome sequence is not complete. In fact it is only a 'working' draft. There is a great deal more work to be done to obtain a complete view of the human genome as the sequences of only two human chromosomes — 21 and 22 — are effectively in the same state as the other genomes that have been sequenced so far (Dunham et al. 1999; Hattori e...
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We present an experimental and theoretical study of the geometric structure of ultrathin BaTiO(3) films grown on Fe(001). Surface x-ray diffraction reveals that the films are terminated by a BaO layer, while the TiO(2) layer is next to the top Fe layer. Cations in termination layers have incomplete oxygen shells inducing strong vertical relaxations. Onset of polarization is observed at a minimu...
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Over an approximately 80-year period since the description of the Sharka disease, the plum pox virus (PPV) has been thoroughly studied on various levels of the infection cycle. World-wide distribution of the virus, severity of the disease for the fruit industry with a potential to be further increased and discovery/emergence of new strains make PPV the most epidemiologically important viral pat...
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A periodic bias in nucleotide frequency with a period of about 11 bp is characteristic for bacterial genomes. This signal is commonly interpreted to relate to the helical pitch of negatively supercoiled DNA. Functions in supercoiling-dependent RNA transcription or as a 'structural code' for DNA packaging have been suggested. Cyanobacterial genomes showed especially strong periodic signals and, ...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2001
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(01)00405-5