evolution – Page 15 – My WordPress Site

Obelisk alpha has a predicted extensive secondary structure and appears to colonise

Biochemistry & Organic Chemistry, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Nanotechnology & SynBio, Origin & Evolution of Life

Previously Unknown Life Forms Discovered Within Human Microbiomes

by Keith CowingDecember 29, 2024January 3, 2025

Volvox - a multicellular green algae. Wikipedia

Biochemistry & Organic Chemistry, Biophysics, Gaia - Planetary Perspectives, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Origin & Evolution of Life

Fundamental Constraints To The Logic Of Living Systems

by Keith CowingDecember 28, 2024December 28, 2024

A schematic illustrating habitability of physical spaces as a function of physical and chemical conditions

Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Microbiology & Virology

Nitrogenase Structural Evolution Across Earth’s History

by Keith CowingDecember 27, 2024December 27, 2024

Evolutionary patterns and dynamics of Proterozoic and early Cambrian eukaryotes. (Top) Taxonomic richness of eukaryotic fossils (sketches depict representative fossils). (Bottom) Species origination and extinction rates. Note scale change at 100 on the vertical axis. Vertical light-gray, blue, and dark-gray bars denote the “Boring Billion,” glacial intervals, and the buffer zone due to edge effects, respectively. Cry., Cryogenian; Ed., Ediacaran; Ꞓ, Cambrian; O, Ordovician; CI, confidence interval; Myr, million years. -- Science

Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extinction events, Fossils & Paleontology, Nomenclature, Systematics, Natural History, Origin & Evolution of Life

Extending The Chart Of Life By Nearly 1.5 billion Years

by Keith CowingDecember 20, 2024December 20, 2024

The evolutionary history of a protein domain may date back further in time than that of the whole-gene ortholog that it is part of. Multidomain genes 3 and 4 originated around the same time. However, they are made up of two protein domains (blue and orange boxes) that emerged and diverged at different points in time—domain 1 is older than domain 2. -- PNAS

Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Habitable Zones, Origin & Evolution of Life

Study Sheds Light On The Origin Of The Genetic Code

by Keith CowingDecember 13, 2024

Illustration of the initially discovered endosymbiont ‘Candidatus Azoamicus ciliaticola’ and its ciliate host. The figure is a composite of a scanning electron microscope image (SEM, grey) and fluorescence images. Visible is the endosymbiont (yellow) and bacterial prey in food vacuoles as well as the large cell nucleus (blue). The outer structure of the weakly fluorescent ciliate as well as the cilia are also visible. Credit S. Ahmerkamp/Max Planck Institute for Marine Microbiology

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Microbiology & Virology

Oxygen Is Not The Limit: Diversity And Metabolic Potential Of Globally Distributed Endosymbionts

by Keith CowingDecember 10, 2024December 10, 2024

Archaean Earth -- Grok via Astrobiology.com

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life

Early Ocean World Chemistry: Prebiotic Nucleoside Phosphorylation in a Simulated Deep-Sea Supercritical Carbon Dioxide-Water Two-Phase Environment

by Keith CowingDecember 4, 2024December 4, 2024

Drawing of a crystal structure of the (PMo12O40)3− Keggin anion shown by the blue polyhedra with sodium ions connecting the anions together in a three-dimensional lattice. In solution, the Keggin ion forms a vast range of ion pairs - Journal of The Royal Society Interface

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Origin & Evolution of Life

Experimentally Measured Assembly Indices Are Required To Determine The Threshold For Life

by Keith CowingDecember 2, 2024December 2, 2024

Historical molecular sequences, which can be reconstructed via genomic and phylogenetic tools, can yield experimentally verified insights into ancient protein structure and chemical function. Function can then be mapped to independent biogeochemical records of life (78; 115). -- q-bio.PE

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Origin & Evolution of Life

Reconstructing Early Microbial Life

by Keith CowingNovember 23, 2024

Fluorescence microscopy video showing vesicle formation -- University of California - San Diego

Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life

How The First Cell Membranes Came To Exist

by Keith CowingNovember 14, 2024