this post was submitted on 19 Jun 2023
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Singularity

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The technological singularity—or simply the singularity—is a hypothetical future point in time at which technological growth becomes uncontrollable and irreversible, resulting in unforeseeable changes to human civilization. According to the most popular version of the singularity hypothesis, I. J. Good's intelligence explosion model, an upgradable intelligent agent will eventually enter a "runaway reaction" of self-improvement cycles, each new and more intelligent generation appearing more and more rapidly, causing an "explosion" in intelligence and resulting in a powerful superintelligence that qualitatively far surpasses all human intelligence.

— Wikipedia

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Natural DNA is often double-stranded: one strand to encode the genes and one backup strand, intertwined in a double helix. The double helix is stabilized by Watson-Crick interactions, which allow the two strands to recognize and pair with one another. Yet there exists another, lesser-known class of interactions between DNA. These so-called normal or reverse Hoogsteen interactions allow a third strand to join in, forming a beautiful triple helix.

In a recent paper, published in Advanced Materials, researchers from the Gothelf lab debut a general method to organize double-stranded DNA, based on Hoogsteen interactions. The study unambiguously demonstrates that triplex-forming strands are capable of sharply bending or “folding” double-stranded DNA to create compacted structures. The appearance of these structures range from hollow two-dimensional shapes to dense 3D constructs and everything in-between, including a structure resembling a potted flower. Gothelf and co-workers have named their method triplex origami.

Journal Article:

Folding Double-Stranded DNA into Designed Shapes with Triplex-Forming Oligonucleotides

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