First law of science, don’t take arguments from authority, always find out for yourself

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So I looked at the paper in your link. The abstract doesn’t give any numbers, and it costs money to read anything more than the abstract. Like most posters I wouldn’t understand the technical jargon anyway.
Wondering why I should be interested in a highly specialist paper published 36 [edit 26!] years ago, I google and find the paper is cited in a critique of a creationist book called
Of Pandas and People. -
ncse.com/creationism/analysis/new-pandas-has-creationist-scholarship-improved
Now you say the paper announces “the improbability of proteins” but according to that critique, the authors drew exactly the opposite conclusion:
“The work done under the direction of Sauer has shown that the amino acid message “is highly degenerate in that many different sequences can code for proteins with essentially the same structure and activity.” … Thus we do not need to rely on an undirected search as Pandas assumes.”
And another paper by those same authors does indeed say:
“This message is highly degenerate in that many different sequences can code for proteins with essentially the same structure and activity”. - ncbi.nlm.nih.gov/pubmed/2315699
Most of us don’t have the specialist knowledge to understand highly specialist technical papers, we don’t have the money to access all the papers which creationists cite, and we don’t know enough to be able to find out whether such papers have since been overturned.
I doubt whether many creationists can either, and
every time I’ve followed up on creationists claims I’ve found the same muddy waters. I can only recommend you do the same before accepting any of these claims.
“Error bars” are the graphical representation, see also terms such as margins of error.
De nada.