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Arlin Stoltzfus

@evolarlin

Mutation samples from the possible, selection from the actual #evobio #popgen #mutation book: http://bit.ly/3QNudjQ blog: http://molevol.org youtube: http://bit.ly/3aytCms

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08.10.2023
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Latest posts by Arlin Stoltzfus @evolarlin

Coming up tomorrow in the evol-mut-circle seminar series

16.02.2026 17:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Genome Biology and Evolution | Oxford Academic The official journal of the Society for Molecular Biology and Evolution. Publishes original research on the evolutionary advances at the forefront of genomics, embracing genome-wide evolutionary inves...

The next evol-mut-circle meeting happens Tues, 17 Feb, 15:00 UTC (8:30 pm India, 10 am EST). Marwan Tuffaha (York) will present her work on cancer drivers and mutation bias reversals
academic.oup.com/mbe/article/...

DM me to join the list for meeting info

11.02.2026 19:38 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1
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How Sequence Context-Dependent Mutability Drives Mutation Rate Variation in the Genome Abstract. The rate of mutations varies >100-fold across the genome, altering the rate of evolution, and susceptibility to genetic diseases. The stronges

the first evol-mut-circle meeting of 2026 happens Tuesday, 20 Jan, 15:00 UTC (8:30 pm India, 10 am EST). Madeleine Oman will present "How Sequence Context-Dependent Mutability Drives Mutation Rate Variation in the Genome"
academic.oup.com/gbe/article/...

DM me to join the list for meeting info

17.01.2026 14:34 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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De-novo promoters emerge more readily from random DNA than from genomic DNA Promoters are DNA sequences that help to initiate transcription. Point mutations can create de-novo promoters, which can consequently transcribe inactive genes or create novel transcripts. We know lit...

our next evol-mut-circle seminar (21 Oct, 15:00 UTC) features Timothy Fuqua on

"De novo promoters emerge more readily from random DNA than genomic DNA"

www.biorxiv.org/content/10.1...

DM me to join the email list. Full schedule:

www.molevol.org/evol-mut-cir...

#popgen, #mutation, #evobio

14.10.2025 14:45 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Distinguishing hypotheses for the appearance of targeted hypomutation | Stoltzfus Research Group at IBBR March 18, 2025 / Arlin Stoltzfus / 0 Comments

Next Tuesday (20 May), evol-mut-circle hosts a discussion on hypotheses to account for targeted hypomutation

We'll have a panel of experts to help with the discussion, including some with key roles in this issue

Message me to join the email list

www.molevol.org/distinguishi...

15.05.2025 00:59 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The CDC has literally been gutted today.

There’s no need for β€œApril Fools” when reality is a nightmare for every human on this planet.

Thousand of scientists fired.
Entire departments erased.

1/

01.04.2025 16:10 πŸ‘ 15232 πŸ” 4996 πŸ’¬ 506 πŸ“Œ 360

colleague from CDC: "Taking it day by day. I'm very angry and sad. We lost some really good people."

03.04.2025 22:13 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Yes, thanks! Quiroz, et al (incl. @grey-monroe.bsky.social) is relevant to understanding the proximate causes of non-random patterns of repair and mutation

But this leaves open whether the driver is mutation or damage. That's the issue we are trying to tackleβ€” how to tell these 2 hypotheses apart

03.04.2025 20:28 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Distinguishing hypotheses for the appearance of targeted hypomutation | Stoltzfus Research Group at IBBR

...has most of the same implications as gene-targeted hypo-mutation, but is more parsimonious

Later this spring, evol-mut-circle will host an open discussion of competing hypotheses, to include some of the scientists active in this area of research

I'll post more details as the date gets closer

03.04.2025 15:39 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Distinguishing hypotheses for the appearance of targeted hypomutation | Stoltzfus Research Group at IBBR

Monroe, et al 2022 argued that mutation in Arabidopsis evolved adaptively to be lower in genes than non-genes

That stimulated a lot of debate over whether the pattern is real

What about the evo model?

A model of gene-targeted hyper-repair (to avoid damage)...

www.molevol.org/distinguishi...

03.04.2025 15:39 πŸ‘ 5 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

Sorry, I try not to be a jerk but that was rude.

02.04.2025 14:03 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

That would have been amazing but it is extremely difficult to get decision-makers to spend large amounts of money or do extremely unpopular things without a guarantee of results. And scientists in early 2020 could not guarantee that air filtration would be a game-changer

24.03.2025 16:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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We are learning the wrong lessons from lockdown And unless we learn the right ones, we risk making the same mistakes in a new pandemic

It's 5 yrs today since lockdown started in England, but "We must never have lockdown again" is the wrong lesson.

Lockdowns are terrible but so are deadly pandemics.

Our choices 5 years ago were limited - we can & must do better in the future.

Do read my post.

open.substack.com/pub/christin...

23.03.2025 13:41 πŸ‘ 2833 πŸ” 706 πŸ’¬ 124 πŸ“Œ 41

dude lost his temper and used force exactly 1 time in his entire recorded life, and this was the context

14.03.2025 21:15 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Great opportunity in a beautiful city

14.03.2025 17:50 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Coming up next Tuesday

@kelleyharris.bsky.social

"What causes mutation rates to vary among populations, species, and cell lineages?"

DM to join the email list

14.03.2025 17:35 πŸ‘ 2 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

The technofascist coup plan a la Yarvin says the regime must be able to control every institution it does not dismantle. IMHO they picked Columbia bc the admins are so willing to sell out. If they capitulate like NIH, Columbia will voluntarily purge its own people and programs to comply with MAGA

11.03.2025 20:09 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Celebrating a pioneer in bioinformatics - Nature Computational Science In honor of the 100th birthday of Margaret Dayhoff, we spotlight her footprint in the field of bioinformatics.

Today is the 100th bday of Margaret Dayhoff! She is the mother of bioinformatics. In her honor, some are celebrating it as Bioinformatics Day or Bioinformaticians' Day.
H/T to Farzana!
www.nature.com/articles/s43...
Happy bioinformatics day to all!

11.03.2025 15:07 πŸ‘ 27 πŸ” 13 πŸ’¬ 0 πŸ“Œ 0
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Real chilling effects A extraordinary pattern of government censorship and threats to speech

New, from me: you were told that the threats to free speech came from wokeness. Some compared it to Maoist China.

Now we are witnessing government power being used to silence dissent and censor ideas. Now we know what real society-wide chilling effects look like. 🧡
open.substack.com/pub/donmoyni...

09.03.2025 17:39 πŸ‘ 4311 πŸ” 1701 πŸ’¬ 110 πŸ“Œ 119

Really wish people would stop talking about the problem with Science under Trump as β€œbudget cuts”.

No. Budgets are set deliberatively by elected members of congress. Budgets haven’t been cut.

What’s happening are *purges* and *censorship*.

08.03.2025 01:36 πŸ‘ 2766 πŸ” 937 πŸ’¬ 22 πŸ“Œ 18

Right, it's important to keep stating loudly that this is an illegal seizure of power, an administrative coup. It's a bit like when a cop with no right to search your car or house acts like he has that right. If you let him in, you are the sucker

We all need to be that guy who just keeps arguing

06.03.2025 22:31 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Exploring New Niches With US federal layoffs, we share a Cliffs Notes for some private sector opportunities. And Superorganism is hiring!

Exploring New Niches - Superorganism | a guide to nature jobs in the private sector for anyone who recently lost a government science or nature job

06.03.2025 15:52 πŸ‘ 17 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0
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'Reboot' Revealed: Elon Musk's CEO-Dictator Playbook In 2022, one of Peter Thiel's favorite thinkers envisioned a second Trump Administration in which the federal government would be run by a β€œCEO”

These are some resources I found useful to understand the administrative coup taking place here. The 2-part series by Robert Evans (with guest Ed Helms) is a bit repetitive but worth 2 hrs IMHO

www.thenerdreich.com/reboot-elon-...

medium.com/@alysion42/d...

www.podchaser.com/podcasts/beh...

06.03.2025 14:18 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

In the most recent evol-mut-circle seminar, @bryangitschlag.bsky.social (of
@davidmccandlish.bsky.social lab) presented his latest work: Graduated effects of mutation bias in adaptation

The recorded talk plus Q-and-A is free here for 6 months:

umd.zoom.us/rec/share/b-...

Passcode: g3PH=?9v

27.02.2025 15:10 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Same here. Many agencies are doing long-term work for strategic gain. If everyone doing research (into fish, weather, security, COVID, etc) goes on strikeβ€” and gets firedβ€” there is no immediate downside. It just makes us stupider, less competitive, and more vulnerable 5 years into the future.

21.02.2025 16:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

OK, thanks. I don't work on speciation. I have done a lot of reading about "evo theory" writ large, and in that genre, he is a reactionary who can be counted on to bring the same hostile and dismissive tone to intra-scientific disputes as he does to extra-scientific ones

21.02.2025 16:04 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

What do you mean by "firings"? By "targeted agencies" do you mean the ones whose employees got the deferred resignation (fork) offer? I am not aware of actual firings at NIST (ideology = 0.01, workforce = 3400)

21.02.2025 15:41 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Which legacy? Gatekeeping and the reactionary mindset are mutually reinforcing.

11.02.2025 22:45 πŸ‘ 3 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

The fitness advantage of phenotypic switching accrues to the lineage over time as it samples diverse environments. Is that a different "level"? I'm not sure the "levels" concept is apt here.

07.02.2025 17:31 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0