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From: nospam@de-ster.demon.nl (J. J. Lodder)
Newsgroups: talk.origins
Subject: Re: origin of biological chirality?
Date: Thu, 22 Aug 2024 09:16:04 +0200
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Bob Casanova <nospam@buzz.off> wrote:

> 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

It isn't. The left-handed molecules can be converted into right-handed
ones, and vica versa, by taking them apart and reassembling them.
For matter/antimatter there is no such possibility.
Disassembling doesn't help,
because you cannot turn antiquarks into quarks.
 
Biological chirality is a triviality,
the matter/antimatter imbalance is a deep problem.
Where has all that antimatter gone?

Jan