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raphguerois.bsky.social

@raphguerois.bsky.social
143 followers 129 following 2 posts

Bioinformatics Group leader at Institute of Integrative Cell Biology (I2BC), Paris-Saclay, France. Protein addiction, interaction networks, molecular evolution & engineering, genome integrity

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Yuan He @yuanhejhu.bsky.social · 22/09/2026
A big week for the lab! Two new papers on how cells repair DNA double-strand breaks: one on getting NHEJ started in chromatin, one on processing the ends before ligation. Years of work by a fantastic team.
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Pim Huis in 't Veld @huis.bsky.social · 09/09/2026
Fresh preprint from the lab: CIP2A tetramerization is required for mitotic DNA repair. A fantastic collaboration with @marcelvanvugt.bsky.social. By @laurendehaan.bsky.social, @rebeccaschneeweiss.bsky.social, and colleagues from Groningen, Vienna, Leiden, and Amsterdam 🙌 doi.org/10.64898/202...
Electron micrograph of full-length human CIP2A and a corresponding Alphafold model
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Claus Wilke @clauswilke.com · 03/09/2026
The reason Claude did well at binder design is because the prompt hardcoded that it should use ESMFold2 for scoring, and apparently ESMFold2 is really good. It's also only a few months old so not widely used yet. AI in biology keeps disappointing. blog.genesmindsmachines.com/p/anthropic-...
blog.genesmindsmachines.com
Anthropic has not solved the peptide-binder design problem, but maybe bi[o]hub has
The protein design field is getting pushed forward by human experts in protein design, who would have thought
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Jessica Andreani @jessicaandreani.bsky.social · 21/08/2026
🚨📣 Hiring a postdoc in bioinformatics 🧬🧑‍💻 Join our team at @i2bcparissaclay.bsky.social to explore biomolecular interactions and improve protein function prediction in bacteriophages! 📍 Gif-sur-Yvette, France ⏳ 13 months (+ possible extension) 📅 Apply here: emploi.cnrs.fr/Offres/CDD/U...
emploi.cnrs.fr
Portail Emploi CNRS - Job offer - Post-doctoral researcher in bioinformatics (M/F): exploring biomolecular interactions for bacteriophage protein function prediction
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Petr Cejka @cejkalab.bsky.social · 14/08/2026
I am happy to share our latest paper on human PIF1, a wonderful collaboration with Raphael Guerois, Ralf Seidel and Ulrich Rass and their teams. Human PIF1 is quite different from its yeast counterpart. Congratulations to Akshay Jayachandran, the first author. genesdev.cshlp.org/content/earl...
genesdev.cshlp.org
Human PIF1 clears secondary DNA structures by coupled DNA unwinding and rewinding activities
A biweekly scientific journal publishing high-quality research in molecular biology and genetics, cancer biology, biochemistry, and related fields
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Francoise Ochsenbein @francoizochsenbein.bsky.social · 14/08/2026
Excited to share our new VIP in Angewandte Chemie! Can foldamers mimic extended protein surfaces? Our peptide-oligourea foldamers reproduce the histone H3-H4 interface on the histone chaperone ASF1, combining nanomolar affinity, stability & cell permeability. onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
Downsizing the Histone H3–H4 Quaternary Structure Into Foldamer Mimetics Yields High‐Affinity and Cell‐Permeable Ligands of ASF1
We present a foldamer strategy to downsize the histone H3-H4 quaternary structure into high-affinity, medium-sized binders (∼2 kDa) for the histone chaperone ASF1. Our peptide-oligourea chimeras, des....
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bioRxiv Biochemistry @biorxiv-biochem.bsky.social · 23/07/2026
A de novo designed enzyme for photo-proximity labeling of E3 ligase neighborhoods in live cells www.biorxiv.org/content/10.64898/20…
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Yo Akiyama @yoakiyama.bsky.social · 21/07/2026
Excited to share our now published paper @cp-cell.bsky.social highlighting advances in modeling the evolution of protein-protein interactions with MSA Pairformer. Big thanks to Zhidian Zhang, Olivia Tang, @eunbelivable.bsky.social @milot.bsky.social @martinsteinegger.bsky.social and @sokrypton.org!
cell.com
Expanding the scope of protein language modeling to protein-protein interactions with MSA Pairformer
Protein language models have excelled at modeling individual proteins, but extending these capabilities to protein complexes remains a major challenge. MSA Pairformer, a parameter-efficient protein la...
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Alberto Ciccia @albertociccia.bsky.social · 27/06/2026
Happy to share ProTiler-Mut, a computational framework that leverages CRISPR tiling screens to map protein mutation–phenotype relationships, developed by Wei He and @hanxu-mdacc.bsky.social in collaboration with @raphguerois.bsky.social and our group. authors.elsevier.com/c/1nKys_siQz...
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Alberto Ciccia @albertociccia.bsky.social · 08/06/2026
Excited to finally share our preprint on mapping the genetic interaction network of the DNA damage response with combinatorial knockout screens led by Sam Hayward, Alina Vaitsiankova, and Tomas Lama-Diaz! www.biorxiv.org/cgi/content/...
biorxiv.org
Mapping the genetic landscape of the DNA damage response with Cas12a-based combinatorial knockout screens
The DNA damage response (DDR) is a complex network of cellular pathways that ensures the faithful maintenance of our genomes upon a wide array of genomic insults. To elucidate the functional architect...
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Sternberg Lab @sternberglab.bsky.social · 21/05/2026
1/8 🚨 New preprint from the @sternberglab.bsky.social & @martinjinek.bsky.social labs! CRISPR-associated transposases (CASTs) insert large DNA cargoes at precise genomic locations — no double-strand breaks needed.
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bioRxiv Biophysics @biorxiv-biophys.bsky.social · 21/05/2026
Accurate protein stability prediction for small domains using mega-scale experiments www.biorxiv.org/content/10.64898/20…
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bioRxiv Biochemistry @biorxiv-biochem.bsky.social · 10/05/2026
Molecular architecture of meiotic pro-crossover factor HEI10 reveals coupling of higher-order assembly and ubiquitin chain formation www.biorxiv.org/content/10.64898/20…
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cryoEM papers @cryoempapers.bsky.social · 09/05/2026
Structural Activation of DNA Unwinding by MCM8/9/HROB pubmed.ncbi.nlm.nih.gov/42094346/ #cryoEM
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Alberto Ciccia @albertociccia.bsky.social · 02/05/2026
Happy to share our new review in @annualreviews.bsky.social on abasic sites and their impact on DNA replication written by @angelotaglialatela.bsky.social. www.annualreviews.org/content/jour...
annualreviews.org
Endogenous Sources of Abasic Sites and Implications for DNA Replication: Mechanisms of Fork Stalling and Recovery
Apurinic/apyrimidinic (AP) sites, also known as abasic sites, are among the most frequent DNA lesions, arising spontaneously or as intermediates in base excision repair. Their structural impediment to...
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Sorek Lab @soreklab.bsky.social · 23/04/2026
We found that TIR domains in animal immune proteins, including the human TLR4, are enzymes that cleave NAD+ to produce the signaling molecule cADPR Read our new preprint by talented Bohdana Hurieva: “Conserved catalytic activity of immune TIR domains in animals” www.biorxiv.org/content/10.6...
biorxiv.org
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Kieran Didi @kdidi.bsky.social · 17/03/2026
📢 We’re launching Proteina-Complexa — and after the Jensen keynote mention, we definitely had to post this thread now ;) Atomistic binder design with generative pretraining + test-time compute, plus large-scale wet-lab validation. Project page: research.nvidia.com/labs/genair/... 🧵 1/n
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Martin Steinegger 🇺🇦 @martinsteinegger.bsky.social · 17/03/2026
AlphaFold database has entered the era of complexes. Together with NVIDIA, DeepMind and EBI, we use ColabFold, OpenFold and MMseqs2-GPU to predict ~31 million complexes (homo & hetro-dimers) resulting in 1.8 million high-quality predictions 📄 research.nvidia.com/labs/dbr/ass... 🌐 alphafold.ebi.ac.uk
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Daan Noordermeer lab @daannoordermeerlab.bsky.social · 13/03/2026
🚨🚨🚨 My institute, the @i2bcparissaclay.bsky.social in beautiful Gif-sur-Yvette and part of @univparissaclay.bsky.social, is recruiting group leaders! Announcement here: www.i2bc.paris-saclay.fr/join-i2bc/te... Open to early career scientist from anywhere or mid-career already in France. Please RB!
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Cell - a Cell Press journal @cp-cell.bsky.social · 29/01/2026
Now online! A non-catalytic role for RFC in PCNA-mediated processive DNA synthesis
dlvr.it
A non-catalytic role for RFC in PCNA-mediated processive DNA synthesis
The RFC clamp loader remains associated with PCNA beyond the loading step, supporting processive DNA replication by stabilizing the inherently unstable PCNA-polymerase ẟ complex.
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Martin Steinegger 🇺🇦 @martinsteinegger.bsky.social · 30/01/2026
FoldMason is out now in @science.org. It generates accurate multiple structure alignments for thousands of protein structures in seconds. Great work by Cameron L. M. Gilchrist and @milot.bsky.social. 📄 www.science.org/doi/10.1126/... 🌐 search.foldseek.com/foldmason 💾 github.com/steineggerla...
science.org
Multiple protein structure alignment at scale with FoldMason
Protein structure is conserved beyond sequence, making multiple structural alignment (MSTA) essential for analyzing distantly related proteins. Computational prediction methods have vastly extended ou...
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Calum H. G. Johnston @chgjohnston.bsky.social · 26/11/2025
Pleased to share our recent article in PNAS - a collaboration with @jessicaandreani.bsky.social & Pablo Radicella, with important roles played by many members of each team. A tripartite protein complex promotes DNA transport during natural transformation in Firmicutes www.pnas.org/doi/10.1073/...
pnas.org
A tripartite protein complex promotes DNA transport during natural transformation in Firmicutes | PNAS
Natural genetic transformation is a conserved mechanism of bacterial horizontal gene transfer, which is directed entirely by the recipient cell and...
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Jessica Andreani @jessicaandreani.bsky.social · 28/11/2025
New paper alert 🚨 I am super happy about it, for many reasons! 👥 It was a great collaborative project with Calum @chgjohnston.bsky.social and J. Pablo Radicella, designed a long time ago (in the pre-AlphaFold era - can you imagine?) together with @polardlab.bsky.social and @raphguerois.bsky.social
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Jana Helsen @helsenjana.bsky.social · 26/11/2025
How do new centromeres evolve while staying compatible with the division machinery? Discover it in our new Nature paper! We show centromeres transition gradually via a mix of drift, selection, and sex, reaching new states that still work with the kinetochore. 👉 doi.org/10.1038/s41586-025-09779-1
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cryoEM papers @cryoempapers.bsky.social · 21/11/2025
Structural basis for fork reversal and RAD51 regulation by the SCF ubiquitin ligase complex of F-box helicase 1 pubmed.ncbi.nlm.nih.gov/41256537/ #cryoEM
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Ernst Schmid @ernstschmid.bsky.social · 12/11/2025
Thrilled to share that the final piece of my PhD work is now on bioRxiv! biorxiv.org/content/10.1... With support from @nvidia and the @NSF, we used AlphaFold to screen 1.6M+ protein pairs, revealing thousands of potential novel PPIs. All data can be viewed at predictomes.org/hp
biorxiv.org
Proteome-wide in silico screening for human protein-protein interactions
Protein-protein interactions (PPIs) drive virtually all biological processes, yet most PPIs have not been identified and even more remain structurally unresolved. We developed a two-step computational...
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raphmercier.bsky.social @raphmercier.bsky.social · 07/11/2025
www.nature.com/articles/s42... Latest from the lab. The conclusion is in the title! Basically, we found that the KMN complex (outer kinetochore) is fully conserved between plants and fungi/animals, showing deep origin. (reminder, you are closer to a mushroom than a mushroom is to a plant.)
nature.com
The composition and structure of the outer kinetochore KMN complex is conserved across kingdoms - Communications Biology
Affinity purification in Arabidopsis identified all key subunits of the outer kinetochore KMN complex. Functional analyses revealed a striking conservation of its composition and organization across k...
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Petr Cejka @cejkalab.bsky.social · 30/10/2025
Among the anti-recombinases, FIGNL1 rules them all. So much that inactivating it brings BRCA2-deficient cells to life. Who is responsible for RAD51 loading without BRCA2/FIGNL1, check out the paper to find out! Great collaboration with @raychaudhurilab.bsky.social www.science.org/doi/10.1126/...
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Hannes Stark @hannes-stark.bsky.social · 26/10/2025
Excited to release BoltzGen which brings SOTA folding performance to binder design! The best part of this project is collaborating with a broad network of leading wetlabs that test BoltzGen at an unprecedented scale, showing success on many novel targets and pushing the model to its limits!
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Nature Biotechnology @natbiotech.nature.com · 23/10/2025
Prime editing sensor libraries evaluate diverse genetic variants in their endogenous genomic contexts go.nature.com/49Q1WCQ rdcu.be/eLVts
go.nature.com
High-throughput evaluation of genetic variants with prime editing sensor libraries - Nature Biotechnology
Prime editing sensor libraries evaluate diverse genetic variants in their endogenous genomic contexts.
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Jay Shendure @jshendure.bsky.social · 14/10/2025
Super excited about first Shendure/Baker Lab collaboration & preprint on a multiplex sequencing-based strategy for screening de novo proteome editors in mammalian cells. Kudos to the brilliant Chase Suiter (not here) & @greenahn.bsky.social on the work! Preprint here: www.biorxiv.org/content/10.1...
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Yehlin Cho @yehlincho.bsky.social · 13/10/2025
Thrilled to announce our new preprint, “Protein Hunter: Exploiting Structure Hallucination within Diffusion for Protein Design,” in collaboration with @Griffin, @GBhardwaj8 and @sokrypton.org 🧬Code and notebooks will be released by the end of this week. 🎧Golden- Kpop Demon Hunters
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Nature Methods @natmethods.nature.com · 18/09/2025
GPU-accelerated MMseqs2 offers tremendous speedup for homology retrieval, protein structure prediction with ColabFold, and protein structure search with Foldseek. @martinsteinegger.bsky.social @milot.bsky.social @machine.learning.bio www.nature.com/articles/s41...
nature.com
GPU-accelerated homology search with MMseqs2 - Nature Methods
Graphics processing unit-accelerated MMseqs2 offers tremendous speedups for homology retrieval from metagenomic databases, query-centered multiple sequence alignment generation for structure predictio...
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Martin Pacesa @martinpacesa.bsky.social · 27/08/2025
Exciting to see our protein binder design pipeline BindCraft published in its final form in @Nature ! This has been an amazing collaborative effort with Lennart, Christian, @sokrypton.org, Bruno and many other amazing lab members and collaborators. www.nature.com/articles/s41...
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Cell - a Cell Press journal @cp-cell.bsky.social · 05/08/2025
Now online! AI-generated MLH1 small binder improves prime editing efficiency
dlvr.it
AI-generated MLH1 small binder improves prime editing efficiency
A compact, AI-generated suppressor of DNA mismatch repair can enhance prime editing in vivo and in vitro and can be integrated into a variety of prime editing architectures.
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Valérie Borde @lab-borde.bsky.social · 03/08/2025
www.biorxiv.org/content/10.1...
biorxiv.org
RPA directly stimulates Mer3/HFM1 helicase processivity to ensure normal crossover formation in meiosis
Meiotic crossover formation is critical for generating viable gametes and enhancing genetic diversity. The helicase Mer3 (HFM1 in humans) is a highly conserved factor essential for promoting crossover...
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Martin Steinegger 🇺🇦 @martinsteinegger.bsky.social · 07/07/2025
Folddisco finds similar (dis)continuous 3D motifs in large protein structure databases. Its efficient index enables fast uncharacterized active site annotation, protein conformational state analysis and PPI interface comparison. 1/9🧶🧬 📄 www.biorxiv.org/content/10.1... 🌐 search.foldseek.com/folddisco
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luokai @luok.ai · 01/07/2025
AI just cracked de novo antibody design with a 100x leap! 🧪 Chai-2, a next-gen multimodal generative model, is shaking up protein design. With a 16% hit rate in fully de novo antibody design—over 100 times better than previous methods—it’s making drug discovery faster and more precise than ever.
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Gabriele Corso @gcorso.bsky.social · 06/06/2025
Excited to unveil Boltz-2, our new model capable not only of predicting structures but also binding affinities! Boltz-2 is the first AI model to approach the performance of FEP simulations while being more than 1000x faster! All open-sourced under MIT license! A thread… 🤗🚀
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Yehlin Cho @yehlincho.bsky.social · 03/06/2025
🚀 Excited to release BoltzDesign1! ✨ Now with LogMD-based trajectory visualization. 🔗 Demo: rcsb.ai/ff9c2b1ee8 Feedback & collabs welcome! 🙌 🔗: GitHub: github.com/yehlincho/Bo... 🔗: Colab: colab.research.google.com/github/yehli... @sokrypton.org @martinpacesa.bsky.social
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Di Jiang @dijiang319.bsky.social · 16/05/2025
@science.org 🧫🧬❄️🔬 Molecular basis of influenza ribonucleoprotein complex assembly and processive RNA synthesis | Science www.science.org/doi/10.1126/... @yiweichang.bsky.social www.yiweichanglab.org @jiwasa.bsky.social #virology #Influenza #Cryo-EM #StructuralBiology #RNA #polymerase
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Alexis Verger 🧬🧫🧪 @alexis-verger.cpesr.fr · 14/05/2025
Forget liquid-liquid phase separation, here comes solid phase transition 😱 www.nature.com/articles/s41...
nature.com
Solid phase transitions as a solution to the genome folding paradox - Nature
In vitro reconstitution and in vivo live-cell imaging of LHX2–EBF1–LDB1 enhancer hubs in olfactory sensory neurons reveals that these transcription factors form condensates with solid, rathe...
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Calum H. G. Johnston @chgjohnston.bsky.social · 12/05/2025
Pleased to share a new preprint - a great collaboration with @jessicaandreani.bsky.social and the Guerois lab at I2BC, and the Radicella lab at the CEA. Using stuctural modelling, we reveal & validate a 3 protein complex involved in DNA import during transformation. www.biorxiv.org/content/10.1...
biorxiv.org
A tripartite protein complex promotes DNA transport during natural transformation in firmicutes.
Natural genetic transformation is a conserved mechanism of bacterial horizontal gene transfer, which is directed entirely by the recipient cell and facilitates the acquisition of new genetic traits su...
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Petr Cejka @cejkalab.bsky.social · 05/05/2025
Please see our latest paper on the role of EXO1 in meiosis: "EXO1 promotes the meiotic MLH1-MLH3 endonuclease through conserved interactions with MLH1, MSH4 and DNA". Congratulations to both first authors, Megha Roy and Aurore Sanchez and thanks to all our collaborators!
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Alberto Ciccia @albertociccia.bsky.social · 17/04/2025
Happy to share our DNA Repair special issue on the replication stress response curated with @vindignilab.bsky.social. www.sciencedirect.com/special-issu...
sciencedirect.com
DNA Repair | The replication stress response: mechanisms and functions | ScienceDirect.com by ElsevierScienceDirect
High-fidelity DNA replication is constantly challenged by a diverse range of obstacles, including endogenous lesions and secondary structures in the DNA template, tightly bound protein-DNA complexes, ...
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Jessica Andreani @jessicaandreani.bsky.social · 14/04/2025
📣 Happy to announce that "DprA recruits ComM to facilitate recombination during natural transformation in Gram-negative bacteria" just got published in PNAS www.pnas.org/doi/abs/10.1... 🧬🧶👩‍🔬👩‍💻 Collaborative and interdisciplinary work, together with the groups of Ankur Dalia and J. Pablo Radicella
pnas.org
DprA recruits ComM to facilitate recombination during natural transformation in Gram-negative bacteria | PNAS
Natural transformation (NT) represents one of the major modes of horizontal gene transfer in bacterial species. During NT, cells can take up free D...
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Di Jiang @dijiang319.bsky.social · 14/04/2025
🧬 @science.org Structural insights into chromatin remodeling by ISWI during active ATP hydrolysis | Science www.science.org/doi/10.1126/...
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Eric C. Greene @dnacurtain.bsky.social · 11/04/2025
I am a professor at Columbia University. All of the student NIH training grants have been canceled and now there are reports that ALL funding will be frozen. Why are Universities not banding together and speaking out publicly and forcibly about governmental attacks on biomedical research?
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MAYosis @mayosis.bsky.social · 07/04/2025
We have a complete program ! meiosis.cornell.edu/mayosis2025/... The #Mayosis25 seminar series will open with a tribute to Scott Hawley by @jeffsekelsky.bsky.social. Congrats to all the selected speakers and we look forward to hearing about your fantastic science ! #Meiosis4ever
meiosis.cornell.edu
MAYosis 2025
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PSB_Grenoble @psb-grenoble.bsky.social · 19/03/2025
🧬 Don't miss out the PSB Symposium on " #MachineLearning in Cellular #StructuralBiology " at the EPN Campus Grenoble, France, on 26-27 June 2025 🧬 🐦Early Bird rate until 15 April (registration deadline 25 May) Info & registration: www.psb-grenoble.eu/psbsymposium2025 #AI #Proteindesign
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