Results 121 to 130 of about 73,558 (196)

The first peptides: the evolutionary transition between prebiotic amino acids and early proteins [PDF]

open access: yes, 2009
The issues we attempt to tackle here are what the first peptides did look like when they emerged on the primitive earth, and what simple catalytic activities they fulfilled.
Buhrman, Harry   +4 more
core   +5 more sources

Biochemical Characterization of a Lanthanide-Dependent DNAzyme with Normal and Phosphorothioate-Modified Substrates [PDF]

open access: yes, 2015
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Biochemistry, copyright © American Chemical Society after peer review and technical editing by publisher.
Huang, Po-Jung Jimmy   +3 more
core   +1 more source

Witnessing the Evolution of RNA [PDF]

open access: yes, 2022
The RNA World theory postulates that at a certain point around 4 billion years ago during an RNA World period, a molecule, possibly RNA, developed the ability to self-replicate via polymerization.
Portillo, Xavier
core   +1 more source

How to build a living thing [PDF]

open access: yes, 2009
Thesis (S.M. in Science Writing)--Massachusetts Institute of Technology, Dept. of Humanities, Graduate Program in Science Writing, 2009.Cataloged from PDF version of thesis.Includes bibliographical references (p.
Campbell, MacGregor (MacGregor Ballard)
core  

Correcting pervasive errors in RNA crystallography through enumerative structure prediction

open access: yes, 2012
Three-dimensional RNA models fitted into crystallographic density maps exhibit pervasive conformational ambiguities, geometric errors and steric clashes. To address these problems, we present enumerative real-space refinement assisted by electron density
AT Brunger   +27 more
core   +1 more source

The nonenzymatic template-directed ligation of oligonucleotides

open access: yes, 2006
International audienceThe nonenzymatic template-directed ligation of oligonucleotides containing 2',3'-cyclic phosphate was investigated in the presence of divalent cations. Ligation of the oligonucleotides readily occurred in the presence of Mg2+, Mn2+,
Chernolovskaya, E. L.   +3 more
core   +4 more sources

Local Neutral Networks Help Maintain Inaccurately Replicating Ribozymes [PDF]

open access: yes, 2014
The error threshold of replication limits the selectively maintainable genome size against recurrent deleterious mutations for most fitness landscapes.
Kun, Ádám   +2 more
core  

T. thermophila group I introns that cleave amide bonds [PDF]

open access: yes, 1997
The present invention relates to nucleic acid enzymes or enzymatic RNA molecules that are capable of cleaving a variety of bonds, including phosphodiester bonds and amide bonds, in a variety of substrates.
Joyce, Gerald F.
core   +1 more source

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