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Janna Fierst

@jannafierst.bsky.social
175 followers 307 following 18 posts

Associate Professor at Florida International University Hold the line

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Reposted by Janna Fierst
Matthew Hahn @3rdreviewer.bsky.social · 15/09/2026
New paper with Trang Nguyen! Do you have only a single parent and offspring, but still want to calculate mutation rates? We've got the tool for you--OOPS github.com/TrangNg-Th/O... www.biorxiv.org/content/10.6...
biorxiv.org
Estimating de novo mutation rates using parent-offspring pairs
Existing pedigree approaches to identifying de novo mutations (DNMs) require at least two parents and a single offspring, limiting applicability. Here, we introduce OOPS (Only One Parent Sequencing), ...
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Holly Bik @hollybik.bsky.social · 14/08/2026
My lab is HIRING - we have an opening for a #postdoc focused on marine invertebrate symbioses & evolution (heavy focus on microbial -Omics and bioinformatics, but lots of fun fieldwork opportunities too!) Full position info here: www.biklab.org/join-the-lab Please help spread the word! #SymbioSky
Neon flyer advertising a postdoc job at UGA
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bioRxiv Genomics @biorxiv-genomic.bsky.social · 15/08/2026
The relationship of genetic diversity and inbreeding to extinction risk across over 500 vertebrate diploid genomes www.biorxiv.org/content/10.64898/20…
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Genome Biology and Evolution @genomebiolevol.bsky.social · 20/07/2026
Eggers & @jannafierst.bsky.social suggest TE regulation is relevant right after genome invasion, with mutated TE sequences remaining in the genome for long periods after invasion. 🔗 doi.org/10.1093/gbe/evag165 #TEsky #societyjournal
doi.org
Regulatory Logic and Transposable Element Dynamics in Caenorhabditis Genomes
Abstract. Genome sequencing has revealed a tremendous diversity of transposable elements (TEs) in eukaryotes but there is little understanding of the evolu
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Reposted by Janna Fierst
Rod Page @rdmpage.bsky.social · 27/05/2026
Interesting new tool to extract phylogenies from images (Tremble). It is crazy that this is still something we have to do. doi.org/10.1093/bioi...
doi.org
Treemble: a graphical tool to generate Newick strings from phylogenetic tree images
AbstractSummary. Phylogenetic trees are ubiquitous and central to biology, but most published trees are available only as visual diagrams and not in the ma
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Gavin Woodruff @weirdworms.bsky.social · 19/12/2025
Very excited to share this work led by Austin Link, a graduate student in our lab. We have discovered a novel, fig-associated microbe that promotes reproductive success via variable life history mechanisms in two nematode species. www.biorxiv.org/content/10.6...
biorxiv.org
A novel, fig-associated microbe promotes reproductive success via variable life history mechanisms in C. elegans and C. inopinata
Variation in life history strategies is among the most striking features of animal diversity. Simultaneously, the microbes an animal interacts with are a critical and dynamic aspect of the host enviro...
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Ryan Greenway @ryangreenway.bsky.social · 19/12/2025
Check out our preprint investigating host use in sympatric Caenorhabditis nematodes! We found three Caenorhabditis species in a local community are associated with different invert taxa, and document a strong association between one species and invasive nitidulid beetles. doi.org/10.64898/202...
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Carolyn Bertozzi @carolynbertozzi.bskyverified.social · 20/12/2025
Multidisciplinary training, over time, produces the highest impact people www.science.org/doi/10.1126/...
science.org
Recent discoveries on the acquisition of the highest levels of human performance
Scientists have long debated the origins of exceptional human achievements. This literature review summarizes recent evidence from multiple domains on the acquisition of world-class performance. We re...
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Janna Fierst @jannafierst.bsky.social · 14/12/2025
Sunday run
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Jonathan Pritchard @jkpritch.bsky.social · 11/12/2025
GWAS has been an incredible discovery tool for human genetics: it regularly identifies *causal* links from 1000s of SNPs to any given trait. But mechanistic interpretation is usually difficult. Our latest work on causal models for this is out yesterday: www.nature.com/articles/s41... A short🧵:
nature.com
Causal modelling of gene effects from regulators to programs to traits - Nature
Approaches combining genetic association and Perturb-seq data that link genetic variants to functional programs to traits are described.
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Kurianlab @kurianlab.bsky.social · 12/12/2025
www.nature.com/articles/s41...
nature.com
An RNA splicing system that excises DNA transposons from animal mRNAs - Nature
A new type of mRNA splicing mechanism discovered in Caenorhabditis elegans that detects and removes inverted repeats also occurs in human cells, thereby providing another strategy to protect against t...
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Stanislava Chtarbanova @stanlab-bama.bsky.social · 25/08/2025
Investigating the differential microRNAs expression in young and aged Drosophila melanogaster following Flock House Virus infection www.tandfonline.com/doi/full/10.... New paper! Congrats to all authors! @jannafierst.bsky.social
tandfonline.com
Investigating the differential microRNAs expression in young and aged Drosophila melanogaster following Flock House Virus infection
MicroRNAs (miRNAs) are small non-coding RNAs ~ 19–22 nt long that post-transcriptionally regulate their mRNA targets. In Drosophila melanogaster, the role of miRNAs has mostly been studied in regar...
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Nature @nature.com · 31/07/2025
This surprisingly relaxing footage is from SIX MILES under the ocean – and it’s the deepest ecosystem yet discovered
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Marketa Novotna @marketanovotna.bsky.social · 06/07/2025
I used inducible CRISPR/Cas9 to make Trypanosoma brucei cell line that allowed me to edit originally muti-copy histone gene. We uncovered a novel role of H4 histone tail in gene regulation. I enjoyed working on this exciting project with @joanarcf.bsky.social, a great mentor. doi.org/10.1038/s414...
nature.com
Precision-edited histone tails disrupt polycistronic gene expression controls in trypanosomes - Nature Communications
Transcription in trypanosomatids, such as Trypanosoma brucei, is predominantly polycistronic and involves unconventional RNA polymerase II promoters. This study uses precision gene editing, site-satur...
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Alexey Amunts @amunts.bsky.social · 30/06/2025
Excited to contribute to the Mitoribosome collaborative study led by @wredenberglab.bsky.social in @natcomms.nature.com🎉 "The mitochondrial methylation potential gates mitoribosome assembly" The assembly starts before the completion of the rRNA gene cluster processing🧵 www.nature.com/articles/s41...
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Liz Mandeville @lizmandeville.bsky.social · 30/06/2025
Delighted to post some cool science - a collaboration with my former grad students Cassandre and Jill, and collaborator extraordinaire @erynmcfarlane.bsky.social! doi.org/10.1093/jher...
doi.org
A novel sex-associated genomic region in Catostomus fish species
Abstract. Genomic regions that influence sex are hypothesized to play a key role in evolutionary diversification, as sex determination mechanisms may promo
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Jeremy Berg @jeremymberg.bsky.social · 21/06/2025
My quote of the day I kept a diary right after I was born. Day 1: Tired from the move. Day 2: Everyone thinks I'm an idiot. Steven Wright
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junhyongkim.bsky.social @junhyongkim.bsky.social · 20/06/2025
Despite all that is going on, we are still all working on our science. Our 2nd collaboration with @jisaacmurray.bsky.social‬ and Bob Waterston (UW) is out: Lineage-resolved analysis of embryonic gene expression evolution in C. elegans and C. briggsae | Science www.science.org/doi/10.1126/...
science.org
Lineage-resolved analysis of embryonic gene expression evolution in C. elegans and C. briggsae
The constraints that govern the evolution of gene expression patterns across development remain unclear. Single-cell RNA sequencing can detail these constraints by systematically profiling homologous ...
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Abby Dernburg @adernburg.bsky.social · 19/06/2025
Very happy (and frankly relieved) to see this paper finally out in peer-reviewed form. (Preprint was posted in August 2021, but this is the world we live in now). rdcu.be/erMk6
rdcu.be
Crossover patterning through condensation and coarsening of pro-crossover factors
Nature Cell Biology - Zhang et al. provide evidence that, during meiosis, recombination proteins assemble into active droplets, the coarsening of which partially explains the phenomenon of...
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Institute of Molecular Biotechnology @imbavienna.bsky.social · 16/06/2025
🚨📢 New paper alert! A study led by Kirsten Senti and Julius Brennecke offers new insights into how ancient endogenous retroviruses diversified to exploit different cell “niches” in the fruit fly ovary, and how the host’s defenses adapted in return. imba.science/Brennecke_EMBOJ
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Ted Pavlic (he/him/his) @tedpavlic.bsky.social · 15/06/2025
Nematode towers that you can get to grow in lab using C. elegans. Maybe a new, tractable model system for studying self-organization in the lab. 🧪 "Towering behavior and collective dispersal in Caenorhabditis nematodes" by Perez et al. (2025, Current Biology) www.cell.com/current-biol...
cell.com
Towering behavior and collective dispersal in Caenorhabditis nematodes
Perez et al. report that self-assembling nematode towers occur in nature and can function as collective dispersal structures. Using Caenorhabditis elegans, they establish a tractable empirical model t...
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Martin Hebart @martinhebart.bsky.social · 10/06/2025
Great work by Changde Du from Huiguang He's lab at the Chinese Academy of Sciences. How similar are visual and conceptual representations in (multimodal) large language models to those found in humans? It turns out quite similar! www.nature.com/articles/s42...
nature.com
Human-like object concept representations emerge naturally in multimodal large language models - Nature Machine Intelligence
Multimodal large language models are shown to develop object concept representations similar to those of humans. These representations closely align with neural activity in brain regions involved in o...
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Janna Fierst @jannafierst.bsky.social · 10/06/2025
It won’t last long but for the first time since November 26 I have no outstanding grant or manuscript reviews 🥳
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Janna Fierst @jannafierst.bsky.social · 04/06/2025
This is our cultural revolution and in many ways it’s already done.
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Mohsen Zakeri @mohsenzakeri.bsky.social · 29/05/2025
1/5 We introduce Movi Color, led by Steven Tan (a brilliant undergrad member of Langmead lab) for taxonomic and multi-class classification. It uses a full-text index based on the move structure and does not rely on predefined values (like k-mer length) for index building. github.com/mohsenzakeri...
github.com
Release Movi Color · mohsenzakeri/Movi
This version introduces Movi Color. Movi rows are augmented with run colors, defined based on the origin of the suffixes within each run. The Movi Color index can be built by either an additional ...
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Nature Microbiology @natmicrobiol.nature.com · 29/05/2025
OUT NOW: Structural insights into light harvesting by antenna-containing rhodopsins in marine #Asgard #archaea @bejalab.bsky.social @labinoue.bsky.social #microsky 🦠🧪 www.nature.com/articles/s41...
nature.com
Structural insights into light harvesting by antenna-containing rhodopsins in marine Asgard archaea - Nature Microbiology
Uncultured open-ocean Asgard archaea can harvest light energy using rhodopsins and diverse hydroxylated carotenoid antennas.
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Max Reuter @maxreuter.bsky.social · 29/05/2025
Your regular reminder about why you should publish in @jevbio.bsky.social:
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Scott Delaney @scott-delaney.bsky.social · 14/05/2025
My ongoing request: If your NSF or NIH grant was terminated--whether at Harvard or elsewhere--please report it here. NSF: grant-watch.us/submit-nsf.h... NIH: grant-watch.us/submit-nih.h... Our trackers are actively used in lawsuits and are often the only record that terminations ever occurred.
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Endless Screaming @infinitescream.bsky.social · 02/05/2025
AAAAHHHHHH
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Dina Grohmann @curiousdina.bsky.social · 01/05/2025
In this new publication, we took #archaea for a walk in the chemical garden 😉. The abiotic hydrogen produced in this setting can fuel M. jannaschii’s metabolism. Great interdisciplinary collaboration with the Orsi lab who initiated and led this study. More here www.nature.com/articles/s41...
nature.com
Simulated early Earth geochemistry fuels a hydrogen-dependent primordial metabolism - Nature Ecology & Evolution
In an iron-sulfide chemical garden experiment that mimics the kind of hydrothermal vents that might have occurred in the early Archaean, mackinawite and greigite are precipitated and abiotic H2 is pro...
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Bram van Dijk 🏳️‍🌈 @bramvandijk.bsky.social · 27/04/2025
www.sciencedirect.com/science/arti... Nearly missed my bus stop reading this fascinating review :)
sciencedirect.com
Unraveling the tempo and mode of horizontal gene transfer in bacteria
Research on horizontal gene transfer (HGT) has surged over the past two decades, revealing its critical role in accelerating evolutionary rates, facil…
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Scott Delaney @scott-delaney.bsky.social · 19/04/2025
🙏 We need your help 🙏 The government continues to cancel grants at both NIH and NSF to censor science it doesn't like. We're tracking terminations to organize and advocate. Please report your terminated grants: NIH: forms.gle/J2znQ7y7YpeP... NSF: airtable.com/appGKlSVeXni... w/ @noamross.net
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Jonathan Gilmour @jonathang.bsky.social · 25/04/2025
There's been credible info of intent to delete National Science Foundation (NSF) awards from Research.gov databases during planned downtime, so I grabbed all awards from 1960 to present and uploaded them to a free and open research repository. Please share! dataverse.harvard.edu/dataset.xhtm...
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Tamanash Bhattacharya @tamanash.bsky.social · 18/04/2025
Our study exploring the evolutionary mechanism of alphavirus opal codon retention is now online! www.science.org/doi/10.1126/...
science.org
A conserved opal termination codon optimizes a temperature-dependent trade-off between protein production and processing in alphaviruses
Alphaviruses optimize viral polymerase production and polyprotein processing at distinct temperatures via a premature stop codon.
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sinatramario.bsky.social @sinatramario.bsky.social · 27/03/2025
“Failure to object, when it is your duty to object, makes cowards of men.” —Abraham Lincoln
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Harmit Singh Malik @harmitmalik.bsky.social · 27/03/2025
Proud of this work, led by the amazing Jeannette Tenthorey (now Assistant Professor at UCSF), demonstrating the adaptive power of single indel mutations in host-virus arms races, but a little sad that this is the coda to her amazing postdoc in the Malik & Emerman labs. www.cell.com/cell-genomic...
cell.com
Indels allow antiviral proteins to evolve functional novelty inaccessible by missense mutations
Tenthorey et al. compare the effects of missense and indel mutations on the acquisition of functional novelty by the rapidly evolving antiviral protein TRIM5α. They find that single indel mutations al...
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Mike Schatz @mikeschatz.bsky.social · 08/03/2025
One of the most powerful moments of the day came from Emily Whitehead who told the story of how she was the first pediatric patient to receive CAR T-cell therapy for her leukemia at age 5: “I stand up for science because science saved my life. And that’s a fact.” @standupforscience.bsky.social
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Dr. K. Lotterhos @drk-lo.bsky.social · 07/03/2025
Massachusetts launches a website to hire federal workers who have been laid off. www.mass.gov/federal-work...
mass.gov
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Rob Davis @robwdavis.bsky.social · 06/03/2025
Great job alert: ProPublica is hiring a computational journalist, "someone who will use technology and data to identify and unlock stories that would otherwise be out of reach." Salary: $120K-$140K Remote: ✅ Come join us!
boards.greenhouse.io
Computational Journalist
New York, New York, United States
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Leslie Rissler @ljrissler.bsky.social · 03/03/2025
NSF plans to reinstate all probationary employees who were fired on 18 Feb! NSF’s decision. 👏🏻👏🏻❤️
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 02/03/2025
I work in amazing place: UNC-Chapel Hill Biology. Our faculty of ~50 includes folks engaged in both basic science & pedagogical research. We have an opening for a new Teaching Assistant or Associate Professor to join us in July 2025-happy to answer questions RT unc.peopleadmin.com/postings/297...
unc.peopleadmin.com
Teaching Asst or Teaching Associate Professor
The position calls for teaching three classes per semester, which may include fundamental classes for biology majors such as cell biology and genetics, and biodiversity (ecology, evolution, and organi...
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 01/03/2025
If you've been calling Congress, keep calling & if not, start-we're getting their attention. We had a good visit to a Congressional office yesterday to discuss science funding & the staffer told us how busy they've been-usually the Senate shwitchboard gets 64 calls/minute-now they're getting 1600 🧪
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Charles Я. Davis @charliearchy.bsky.social · 28/02/2025
No, this is the most ashamed you've felt as an American *so far*.
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Christopher Webb @cwebbonline.com · 28/02/2025
Did you know? There’s a directory of Black farmers: “The Black Farmers Index.” Buy and uplift local. Many are small-scale specialists and located in urban areas. I found an organic resource in my area that I will definitely check out.
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Shirley Luckhart @shirleyluckhart.bsky.social · 27/02/2025
Tee for the day ❤️🩵💚💛💙❤️‍🩹
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Rajini Rao @madamescientist.bsky.social · 22/02/2025
Pitt to pause PhD admissions, following Vanderbilt and USC, because of uncertainty of NIH funding to academic universities. Who will teach and train US scientists for pharma and biotech? Should we import them from countries that do? www.wesa.fm/health-scien...
wesa.fm
The University of Pittsburgh pauses its Ph.D. admissions process amid research funding uncertainty
A spokesperson for the University told WESA Friday that the school has "temporarily paused additional Ph.D. offers of admission," while Pitt works to understand how proposed federal funding cuts could...
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André Marques @amarques.bsky.social · 21/02/2025
I am thrilled to share our new review on holocentric chromosomes. It was a lot of fun to write it together with Ines Drinnenberg! Same but different: Centromere regulations in holocentric insects and plants doi.org/10.1016/j.ce...
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Janna Fierst @jannafierst.bsky.social · 21/02/2025
I managed to speak to a staffer at Rep. Maria Salazar's office and they said the mass firings is by far the biggest issue they're hearing about. Keep calling! I use the 5 Calls app. 5 Calls a day, keep going. Keep trying, especially in Republican states.
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Sarah Tuttle @niais.cryptoanarchy.network · 19/02/2025
I want everyone to just take FIVE MINUTES, and take a look at this extremely well put together project 2025 tracker. www.project2025.observer We're less than a month in.
project2025.observer
Project 2025 Tracker
Track the progress on Project 2025
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boehninglab @boehninglab.com · 17/02/2025
Still no SS meetings being posted to the Federal Register. www.federalregister.gov/documents/se...
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