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Xenonucleic acid

Weixin Yan, Aiguo Zhang, Michael J Powell
Gastrointestinal stromal tumors (GISTs) have been recognized as a biologically distinctive type of tumor, different from smooth muscle and neural tumors of the gastrointestinal tract. The identification of genetic aberrations in proto-oncogenes that drive the growth of GISTs is critical for improving the efficacy of cancer therapy by matching targeted drugs to specific mutations. Research into the oncogenic mechanisms of GISTs has found that these tumors frequently contain activating gene mutations in either platelet-derived growth factor receptor A (PDGFRA) or a receptor tyrosine protein associated with a mast cell growth factor receptor encoded by the KIT gene...
July 21, 2016: Chinese Journal of Cancer
Matthew R Dunn, John C Chaput
Recent advances in polymerase engineering have enabled the replication of xenonucleic acid (XNA) polymers with backbone structures distinct from those found in nature. By introducing a selective amplification step into the replication cycle, functional XNA molecules have been isolated by in vitro selection with binding and catalytic activity. Despite these successes, coding and decoding genetic information in XNA polymers remains limited by the fidelity and catalytic efficiency of engineered XNA polymerases...
October 4, 2016: Chembiochem: a European Journal of Chemical Biology
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