![Bold black letters illustrate amino acids that are deduced as early by the approach, while red letters indicate late additions to the alphabet according to the approach (C* implies possible prebiotic synthesis under specific and narrow conditions [4]). Regular black letters represent amino acids that have not been resolved as either early or late by the approach. LUCA: last universal common ancestor; LECA: last eukaryotic common ancestor; rTCA: tricarboxylic acid cycle. -- Trends in Genetics](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Reconstructing.png?resize=1200%2C720&ssl=1)
[Trends in Genetics] The canonical amino acid alphabet has remained remarkably stable since life’s early stages, yet the factors that shaped its emergence remain debated. Early views emphasized prebiotic availability […]
amino acid
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Habitable Zones, Imaging & Spectroscopy, Origin & Evolution of Life, Press Release, Water/Hycean Worlds & Oceanography
Before The Aliens, The Amino Acids
Before any wrinkled, wide-eyed creature from a distant civilization asks to be taken home, the first success in the search for life beyond Earth might be more prosaic. A clue […]
Posted inBiochemistry & Organic Chemistry, Biophysics, Magnetic Fields, Electromagnetism, bioelectricity,, Nanotechnology & SynBio, Origin & Evolution of Life, Press Release
What If The Direction Of A Magnet Could Shape The Building Blocks Of Life?
In a new discovery researchers from the Hebrew University of Jerusalem and the Weizmann Institute of Science have found that something the direction of a magnetic field can influence how […]
Posted inBiosignatures & Paleobiology, Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Sample Return, Status Report
Biosignatures: Evidence for Endogenous Collagen in Edmontosaurus Fossil BoneAnalytical Chemistry via PubMed
Reports of proteins in fossilized bones have been a subject of controversy in the scientific literature because it is assumed that fossilization results in the destruction of all organic components.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
First Interstellar Detection of Methyl Carbamate: A New Observational Anchor for Glycine Chemistry
Glycine-the simplest amino acid-has remained undetected in the interstellar medium despite decades of sensitive searches, motivating alternative approaches to constrain its astrochemical origin.
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
Detecting Fundamental Chiral Biosignatures in the Ultraviolet Polarization Spectrum
Chiral molecules are ubiquitous and necessary for life as we know it. In extant life, the amino acid and sugar constituents of proteins and biopolymers consist of only one enantiomer.
Posted inBiochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Europa, Exploration Gear & Tech, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Status Report, Tricorders & Sensors
Identifying Amino Acid Isomers With Mass Spectrometry On Icy Ocean
Enceladus and Europa are compelling targets for astrobiology investigations due to their potentially habitable subsurface oceans connected to the icy surface by geological processes.
Posted inAstrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
Nonequilibrium Synthesis of Glycolamide (NH2COCH2OH), a Precursor to Amino Acids, on Interstellar Nanoparticles
Complex organic molecules (COMs) are thought to form in cold interstellar environments, yet the chemical routes to key prebiotic precursors remain poorly understood. Glycine, the simplest amino acid, has not […]
Posted inBiochemistry & Organic Chemistry, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life, Status Report
Amino Acids as Molecular Linchpins in the Fundamental Prebiotic Processes of RNA Copying and Vesicle Formation
In addition to being delivered via exogenous means (e.g., chondritic meteorites and comets), amino acids are hypothesized to have been present on early Earth via Urey–Miller-type abiotic processes.
Posted inAstrochemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Origin & Evolution of Life, Press Release
Colliding Dust And The Sparks Of Creation
Two microscopic grains collide and produce a tiny spark. This phenomenon may have provided the energy to kick off life on Earth. But if these solid particles have the same […]