Purdue article is typically silly and humerous. The molecule in question is not even necessary for the mammalian diet since it can be synthesized easily within the body from other molecules. That would selectively make it a late comer not a dominate first comer.
The verbage in the paper is replete with the typical meybe, we imagine, could have been phrases typical of the evolutionary communities vain imaginings. LOL
Not a scintilla of text is devoted as to why or how one molecules predisposition to bond with lefthanded molecules arose is given or how that could possibly influence what other molecules predisposition might be particularly whrn the so called dominate leader doesn't even apprear in the great majority of proteins and enzymes.
Neither does the paper address how among the 50/50 mixture of racemates across all the amino acids present in any abiotic sea and there are many how only twenty are exclusively used in life and of course only the optically pure separated forms are used.
I believe I'll pass on the spaceman from planet zabot theory.. only to say that when these sci-fi theories are proposed its out of desperation because no terrestrial theories such as one are anything other than laughable.
Rock terrraces show 10% bias to lefties... well is 10% the same as 99.99999...999% separation because thats whats required for polypeptides in life molecules. And even if true that lefties like terraces.. why one cannot even imagine ... the end result requires the chance formation pulr lefty molecules when there were plenty of righties absolutely therodynamically indistinguishable handy on the same terrace.... 40% of the molecules were right handed.. maybe they were ugly. LOL
"parity-violating energy differences" could be amplified kinetically in the pre-biotic soup to preferentially select today's L-amino acid/D-sugar biochemistry over D-amino acid/L-sugar "mirror life".
If this newspeak can be interpreted to make any sense.. lets hear it.
Of course any so called energy difference at the QM level would need be amplified say by a factor of a trillion orders of magnitude. But I geuss the magnifier got lost because today no experiment can demonstrate its operation. Yep those 50/50 racemic mixtures just refuse to be amplified in the old soup and continue to form useless racemic peptides.
Although we do not fully understand the origin of the chart of intermediary metabolism,our present knowledge points to a logic which I believe we will one day understand as we nowcomprehend structures like the periodic table of the elements.
One day we will all be engulfed in peace and happiness blah blah blah.
The problem of selecting twenty amino acids from many and using only one form predominately remains as inexplicable as 100 years ago.
Separation always requires the genetic machinery codes and instructions that are built in the same optically pure fashion.