40 research outputs found

    Arte Contemporàneo Asiàtico

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    Where I'm Calling From: A Roundtable on Location and Region

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    Poses a series of questions to roundtable discussion participants Australian National University art researcher Michelle Antoinette; UK born and NZ based art writer Jon Bywater; Philipino art curator Joselina Cruz; Australian art lecturer Sophie McIntyre; University of Auckland teaching fellow Nina Tonga; Singaporean art curator Joyce Toh; and Columbian born and Singapore based art curator and gallery manager Viviana Mejía. Discusses their notions of location, region and sub-region, the public imaginary, curating, contested terrain, and idea of cities taking on an islandlike status in their own countrie

    Phage N15 protelomerase resolves its tos recognition site into hairpin telomeres within mammalian cells

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    Phage N15 protelomerase (TelN) cleaves double-stranded circular DNA containing a telomerase-occupancy-site (tos) and rejoins the resulting linear-ends to form closed-hairpin-telomeres in Escherichia coli (E. coli). ContinuedTelN expression is essential to support resolution of the linear structure. In mammalian cells, no enzyme withTelN-like activities has been found. In this work, we show that phage TelN, expressed transiently and stably in human and mouse cells, recapitulates its native activities in these exogenous environments. We found TelN to accurately resolve tos-DNA in vitro and in vivo within human and mouse cells into linear DNA-containing terminal telomeres that are resistant to RecBCD degradation, a hallmark of protelomerase processing. In stable cells, TelN activity was detectable for at least 60 days, which suggests the possibility of limited silencing of its expression.Correspondingly, linear plasmid containing a 100 kb human β-globin gene expressed for at least 120 h in non-β-globin-expressing mouse cells with TelN presence. Our results demonstrate TelN is able to cut and heal DNA ashairpin-telomeres within mammalian cells, providing a tool for creating novel structures by DNA resolution in these hosts. The TelN protelomerase may be useful for exploring novel technologies for genome interrogationand chromosome engineering
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