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From: Bob Casanova <nospam@buzz.off>
Newsgroups: talk.origins
Subject: Re: origin of biological chirality?
Date: Sun, 18 Aug 2024 10:01:35 -0700
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On Sun, 18 Aug 2024 00:08:49 +0100, the following appeared
in talk.origins, posted by Ernest Major
<{$to$}@meden.demon.co.uk>:

>A study has found that lipid membranes can be selectively permeable to 
>one or the other sugar or amino acid enantiomer. The study used membrane 
>models inspired by the membranes of modern organisms, so is not directly 
>relevant to abiogenesis. However it still raises the possibility that 
>membrane selectivity was the source of chirality in biological 
>molecules. One possible issue is does this effect require chiral 
>membrane lipids; if so it only move the question of the origin of 
>chirality from sugars and amino acids to lipids.
>
ISTM that this is similar to the "matter/antimatter"
imbalance; neither is inherently more "natural" than the
other, but one became more prevalent. And IIRC, the m/am
imbalance is now assumed to be a matter of chance in the
original ratio. I could; of course, be mistaken in that;
it's been years since I followed it even casually.
>
>https://www.biorxiv.org/content/10.1101/2024.04.23.590732v2.full.pdf
>
-- 

Bob C.

"The most exciting phrase to hear in science,
 the one that heralds new discoveries, is not
 'Eureka!' but 'That's funny...'"

- Isaac Asimov