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Articles by Daniel Duzdevich
Chiral discrimination of amino acids in meteorite and desert soil extracts via single-molecule nanogap conductance
Abstract Life on Earth uses L-amino acids and D-sugars, whereas abiotic processes produce equal abundances of both enantiomers. Detecting enantiomeric excess among molecules of biological interest has therefore been proposed as a potential biosignature for life beyond Earth. However, robust electrical methods for determining the L/D ratios of amino acids and sugars at low concentrations, particularly in chemically complex samples, remain limited.
Overcoming nucleotide bias in the nonenzymatic copying of RNA templates.
Abstract The RNA World hypothesis posits that RNA was the molecule of both heredity and function during the emergence of life. This hypothesis implies that RNA templates can be copied, and ultimately replicated, without the catalytic aid of evolved enzymes. A major problem with nonenzymatic templated polymerization has been the very poor copying of sequences containing rA and rU.
Nanogap Solid-State Single-Molecule Detection at Mars, Europa, and Microgravity Conditions
Abstract Solid-state nanogap systems are an emerging technology for in-situ life detection due to their single-molecule resolution of a wide range of biomolecules, including amino acids and informational polymers, at the parts per billion to trillion level.
Potentially Prebiotic Activation Chemistry Compatible with Nonenzymatic RNA Copying
Download Hi-Res ImageDownload to MS-PowerPointCite This:J. Am. Chem. Soc. 2020, XXXX, XXX RETURN TO ARTICLES ASAPPREVCommunicationNEXT Stephanie J. Zhang, Daniel Duzdevich Daniel Duzdevich Howard Hughes Medical Institute, Department of Molecular Biology, and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, Massachusetts 02114, United States , and Jack W. Szostak* Jack W.
In vitro selection of ribozyme ligases that use prebiotically plausible 2-aminoimidazole-activated substrates
In vitro selection of ribozyme ligases that use prebiotically plausible 2-aminoimidazole–activated substrates Travis Walton, Saurja DasGupta, Daniel Duzdevich, Seung Soo Oh, Jack W. Szostak Proceedings of the National Academy of Sciences Mar 2020, 201914367; DOI: 10.1073/pnas.1914367117
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