815 resultados para Decoration and ornament, Architectural


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In portfolio.

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[v. 1] Prehistoric art; ancient art and architecture; eastern, early Christian, Byzantine, Saracenic, Romanesque, Gothic, and renaissance architecture and ornament.--[v. 2] Pottery; enamels; ivories; metal work; furniture; textile fabrics; mosaics; glass; and book decoration.

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Reprinted from the American architect, the Architectural record and other architectural magazines.

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Mode of access: Internet.

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Mode of access: Internet.

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Appendix: List of artists and workmen leaving Paris for St. Petersburg in 1716.--Spaendonck, G. van. Salons.--Oudry, J. B. Salons.--List of officials at the Gobelins.--Caffieri, J. Chronological list of his work for the crown.--Oeben and Reisener. Detailed agreement for the Bureau du roi.--Gouthière. Entries in the sale catalogue of the duke d'Aumont.--Duplessis. Entries in the livre-journal of Lazare Duvaux.--List of French cabinet-makers.

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Transcription factors often determine cell fate and tissue development. Chondrogenesis is the developmental process by which cartilages form. Recently, gene targeting studies have shown that two transcription factors, L-Sox5 and Sox6, play essential and redundant roles in chondrogenesis in vivo by converting precartilaginous cell condensations into cartilages. Both are highly similar High-Mobility-Group (HMG)-domain proteins that bind and subsequently bend DNA containing the 7bp HMG site (A/T)(A/T)CAA(A/T)G. They have no transactivation domain, but homo- and hetero-dimerize and preferentially bind DNA containing two HMG sites. They are thought to play an architectural role in transactivation by facilitating long-range DNA and protein interactions. To understand their molecular mechanism of action, we investigated how phasing, orientation, and spacing between HMG sites affect L-Sox5 and Sox6 DNA-binding. We determined that L-Sox5 and Sox6 dimers bind with high affinity to paired HMG sites in DNA rather than a single HMG site. Binding of paired sites is independent of DNA helical phasing, orientation of paired HMG sites and independent of distance up to 255 base pairs between sites. Mutational analysis demonstrated that binding of L-Sox5 and Sox6, independent of orientation of the sites, is critically dependent on the presence of paired HMG sites rather than one HMG site alone. Our data support a unique and novel model whereby L-Sox5 and Sox6 dimerize and bind DNA with pronounced spatial flexibility, possibly by a flexible hinge, and act as architectural transcription factors that bring distant DNA sites and proteins together to form higher order transcriptional complexes that are essential for the activation of their target genes in chondrogenesis. ^