Page 2: Research news on Genomes

Genomes, as physical systems, comprise the complete set of nucleic acid molecules (typically DNA, or RNA in some viruses) that encode the hereditary information of an organism, including all chromosomes and extrachromosomal genetic elements. They are organized into linear or circular polymers of nucleotides, with specific higher-order structures such as chromatin in eukaryotes or nucleoid organization in prokaryotes. At the physical level, genomes exhibit defined sequence composition, length, and structural features (e.g., replication origins, regulatory regions, repetitive elements) that collectively determine their stability, replication dynamics, mutational patterns, and interactions with cellular molecular machinery.

Why cells respond 'incorrectly' in old age

Some of the signs of aging in human cells originate in the cell nucleus, because the packaged form of DNA changes with age. This has now been demonstrated by PSI researchers. It means that older cells can no longer react ...

RNA-guided CRISPR system activates gene expression

In back-to-back studies published in Nature, researchers from Purdue University and Columbia University report a naturally evolved gene-editing system that can activate genes, offering an advantage over existing CRISPR gene-editing ...

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