Confronting risks of mirror life
https://www.science.org/doi/10.1126/science.ads9158
Abstract
All known life is homochiral. DNA and RNA are made from “righthanded”
nucleotides, and proteins are made from “left-handed” amino acids. Driven
by curiosity and plausible applications, some researchers had
Again thank you.
The result is over-interpreted, but I’m glad to have it, and it is related to
the way I want to frame some of these questions.
Donna is defnly one of the silverbacks. She is the one who did the
solution-separation experiments I referred to in the last post. It is good to
kno
"The researchers specifically sought to reproduce homochirality in a
central process in amino acid production called transamination, by using a
relatively simple, plausibly prebiotic chemistry that excludes complex
enzymes.
In early tests, the team’s experimental reaction worked, and yielded amino
I always assumed that the chirality asymmetry of organic molecules on
earth was a simple feedback loop or the "sensitive dependence on initial
conditions" of a complex adaptive system (biosphere). I've heard (but
not parsed fully) similar arguments about matter/anti-matter? Or like
the Highl
More drama in that part of that account than seems warranted to me.
Great that they got the data back, and it is in good shape, and that they can
do a detailed analysis of content.
When I get time, I’ll find the article and see what their “nearly equal” left
and right actually means. How m
Alzheimer's, Parkinson's, Huntington's Disease and Creutzfeldt-Jakob disease
(and mad cow) all involve chirality changes.
-Original Message-
From: Friam On Behalf Of glen
Sent: Thursday, January 30, 2025 7:18 AM
To: friam@redfish.com
Subject: [FRIAM] Rare Earth
Ast
Asteroid fragments upend theory of how life on Earth bloomed
https://www.nature.com/articles/d41586-025-00264-3
"Glavin is most perplexed by the discovery of an equal mixture of left-handed and
right-handed amino acids on Bennu. He, like many scientists, had thought that organic
molecules from
