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Jonathan Froehlich

@jjfroehlich.bsky.social
420 followers 287 following 4 posts

Scientist // gene regulation, genomics, synbio, stem cells // previously postdoc at @EddaGSchulz @MPI_MolGen, phd at @N_Rajewsky @BIMSB_MDC // jjfroehlich.github.io

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Reposted by Jonathan Froehlich
Thomas Dietterich @tdietterich.bsky.social · 13/09/2026
We are seeing a new trend in submissions to @arxiv.bsky.social (and presumably to conferences and journals): Authors submitting papers whose contents they likely do not understand. 1/
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Yun S. Song @yun-s-song.bsky.social · 09/09/2026
We are thrilled to share that our GPN-Star manuscript is now published and freely available: doi.org/10.1038/s415... (1/n)
doi.org
Predicting genome-wide functional constraints with GPN-Star - Nature
GPN-Star, a genomic language model with a phylogeny-aware architecture for whole-genome alignment data, is shown to be a scalable and flexible tool for genetic variant effect prediction across species...
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Stowers Institute @stowersinstitute.bsky.social · 08/09/2026
The Stowers Institute partnered with Google DeepMind on AlphaGenome Atlas, a new AI-powered resource mapping predictions for 9+ billion possible single-letter DNA changes. 🧬 Stowers’ @juliazeitlinger.bsky.social Ph.D., helped guide its development and demonstrate its potential. bit.ly/4r4Bn6C
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Wendy Bickmore @wbickmor.bsky.social · 08/09/2026
It was great working with students Kun and Ryan and @hannahlong.bsky.social, combing the literature to try and find examples of bona fide disease-causing variants in non-coding elements - promoters, enhancers and silencers. www.nature.com/articles/s41...
nature.com
Mechanisms underlying disease-causing variants in promoters and enhancers - Nature Genetics
This Review discusses how rare-disease-causing variants in the noncoding genome impact gene regulation, why these examples are so few and how new approaches could accelerate discovery of noncoding var...
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Hannah Long @hannahlong.bsky.social · 08/09/2026
📣 Interested in non-coding disease-causing variants? Check out our review "Mechanisms underlying disease-causing variants in promoters and enhancers". Interesting mechanisms, challenges and future perspectives. Great to work with @wbickmor.bsky.social, Kun and Ryan! www.nature.com/articles/s41...
nature.com
Mechanisms underlying disease-causing variants in promoters and enhancers - Nature Genetics
This Review discusses how rare-disease-causing variants in the noncoding genome impact gene regulation, why these examples are so few and how new approaches could accelerate discovery of noncoding var...
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Anh Hoang Le, PhD 🏳️‍🌈🏴󠁧󠁢󠁳󠁣󠁴󠁿🇻🇳 @anhhle2702.bsky.social · 07/09/2026
Very happy to share my postdoc paper is out now in @natcellbio.nature.com titled "Tissue flow acts as a guidance cue for immune cell polarization and directional migration". If you love imaging and immune cells, this is for you! #microscopymonday www.nature.com/articles/s41... A 🧵: 1/n
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Max Planck Institute of Immunobiology and Epigenetics @mpi-ie.bsky.social · 07/09/2026
🌟 Women Shaping #STEM: Stories, Careers, Conversations 🌟 Join us for an inspiring talk by @julianeg.bsky.social, MPI-IE Group Leader, as she shares the personal story behind her career. 📅 Wed, Sept 16 | 11-12 AM 📍 Lecture Hall, MPI-IE, Freiburg Register via @cibss.bsky.social: s.gwdg.de/iMivMZ
Flyer for a seminar series titled 'Women Shaping STEM' featuring a smiling woman in a black sleeveless top against a green background and event details.
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Igor Ulitsky @igorulitsky.bsky.social · 01/09/2026
A pervasive RT–qPCR artifact inflates RNA knockdown by RNA-targeting CRISPR - Yikey Yikes! BTW, similar concerns apply to siRNAs/ASOs that are sometimes suspected to affect RT and/or PCR . So nice somebody looked into this! rdcu.be/RUYFaGa649va
rdcu.be
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Paul Thompson @ptenigma.bsky.social · 29/08/2026
I'm going to have to update my neurogenetics class in the Fall with this cool new result (July Nature Medicine): 🔥a 34-circRNA "circular RNA" blood signature detected biomarker-confirmed Alzheimer’s disease with AUC=0.945 ...
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Mireya Plass @mireyaplass.bsky.social · 27/08/2026
🚨 Job Alert We are looking for a Research Technician to join my lab a IDIBELL/UB The successful candidate will support experimental work in the lab. Tasks include the culture and differentiation of iPSC cell lines, characterization 2D human nervous system models
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Jesse Engreitz @jengreitz.bsky.social · 18/09/2025
Excited for a major milestone in our efforts to map enhancers and interpret variants in the human genome: The E2G Portal! e2g.stanford.edu This collates our predictions of enhancer-gene regulatory interactions across >1,600 cell types and tissues. Uses cases 👇 1/
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Reese Richardson @reeserichardson.bsky.social · 25/08/2026
A massive update: At least ~15 companies~ are selling scientists antibodies using faked validation data. We've documented 18,000+ manipulated images on 17,000+ products sold by leading laboratory suppliers including Thermo Fisher, Abcam, Santa Cruz Biotechnology, Millipore Sigma and Bio-Techne. 1/🧵
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Shenzhi Chen @shenzhichen1999.bsky.social · 25/08/2026
Excited to share our paper in @natgenet.nature.com on the de novo design of tissue-specific mammalian enhancers that function in vivo in mouse embryos. 🧬🐭 www.nature.com/articles/s41...
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Dani León-Periñán @danilexn.bsky.social · 26/08/2026
Malva out in Nature! 🚀 RNA sequences make cells different from each other. Single-cell data captures much of this, but most stays in the dark because we reduce it to gene counts. We introduce Malva to make the world's single-cell data searchable. What took days is now one query in seconds.
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Erik van Nimwegen @erikvannimwegen.bsky.social · 21/08/2026
Remember this? bsky.app/profile/did:... Rigorous visualization of the structure in your high-dimensional data. Fantastic work by @dhdegroot.bsky.social With help of the reviewers of Nat Biotech it is now updated, extended an officially published here: www.nature.com/articles/s41... 1/n
nature.com
Bonsai reconstructs tree representations for distortion-free visualization and exploration of high-dimensional data - Nature Biotechnology
High-dimensional data are visualized through representation on tree structures.
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Razvan Borza @rborza.bsky.social · 21/08/2026
New animation of Zinc Finger transcription factors binding DNA. My favorite TF family. 👀 Excited to share more at the #EMBLTranscript Conference next week! - Rendered in Blender with #MolecularNodes
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Elzo de Wit lab @ NKI @dewitlab.bsky.social · 19/08/2026
Not everything was done in cancer cell lines. Our original observation: www.nature.com/articles/nat... (note that we did not call them SEs back then, but the TF clusters are very similar) was in mESCs. Observations in GAM from the Pombo group were also on mESCs.
nature.com
The pluripotent genome in three dimensions is shaped around pluripotency factors - Nature
Using 4C technology, higher-order topological features of the pluripotent genome are identified; in pluripotent stem cells, Nanog clusters specifically with other pluripotency genes and this clustering is centred around Nanog-binding sites, suggesting that Nanog helps to shape the three-dimensional structure of the pluripotent genome and thereby contributes to the robustness of the pluripotent state.
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Evgeny Kvon @evgenykvon.bsky.social · 18/08/2026
“Super-enhancer hubs are rare, nonspecific, and neither necessary nor sufficient for transcriptional bursting” www.cell.com/cell-genomic...
cell.com
Single-cell 3D genome imaging shows super-enhancer hubs are rare, nonspecific, and neither necessary nor sufficient for transcriptional bursting
Super-enhancers have been proposed to cluster in the nucleus when compared to other genomic elements. Le et al. found that super-enhancer clustering was rare and driven by non-specific interactions. P...
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Jonathan Pritchard @jkpritch.bsky.social · 12/08/2026
I'm curious about the reasons why some people/labs choose NOT to preprint their papers, either for specific papers or in general. Do you have a sense of this, either for yourself or for colleagues and collaborators? [I have some guesses, but curious to hear from others]
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Jonathan Pritchard @jkpritch.bsky.social · 09/08/2026
Must-know numbers in human genetics -- As many of you know, I'm writing a free online textbook in human genetics. In this blog post I cover a key skill for genome scientists from that book: how to use mental math to figure out key genome properties. jkpritchard.substack.com/p/on-fermi-p...
jkpritchard.substack.com
On Fermi Problems in Human Genetics
and some very useful numbers about human genomes to get you started!
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Tim Duffy @timfduffy.com · 07/08/2026
Black Hat has posted the recent OpenAI talk where they describe the agent message board involved in the HuggingFace hack
youtube.com
Black Hat USA 2026: The 'Breaking' News: The OpenAI–Hugging Face Incident
YouTube video by Black Hat
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Jesse Engreitz @jengreitz.bsky.social · 04/08/2026
Update: scE2G is now online at Nature Genetics! Since the preprint, we added a new benchmark on a fully held-out CRISPR dataset. scE2G continues to show state-of-the-art performance, reinforcing that it generalizes well nature.com/articles/s41588-026-02695-8 1/
Held-out CRISPR benchmark: n=189 positives, 4,175 tested pairs from 5 cell types. Weighted AUPRC bar chart with scE2G-Multiome and scE2G-ATAC highest, above Distance to TSS, ABC, and 8 other single-cell methods.
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Martin Steinegger 🇺🇦 @martinsteinegger.bsky.social · 01/08/2026
Riboseek is a fast RNA/DNA search. More sensitive than nhmmer at 250x speed. Structure-aware realignment produces MSAs approaching rMSA quality. Plus 1.7M precomputed RNA MSAs, and an API to search your own 📄 www.biorxiv.org/content/10.6... 💾 github.com/steineggerla... 🌐 search.foldseek.com/riboseek
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Richard Sever @richardsever.bsky.social · 02/08/2026
It's cautionary tale for LLM use though. Data aren't democratic; some are better. Reminds me of something a biologist recently said to me of an AI colleague: "His models are fantastic. It's just a shame he doesn't realize the output's garbage because half the papers fed into it are wrong.." 5/n
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Florian Bernard @florianbrnrd.bsky.social · 24/07/2026
Everyone reduces dimensions. We reduced cells. Read our latest work on bioRxiv: Quantitative Description of C. elegans mRNA Landscapes From High Coverage Single-Cell Transcriptomes www.biorxiv.org/content/10.6...
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Jay Shendure @jshendure.bsky.social · 31/07/2026
Thrilled to post thread re: new single-cell lineage of mouse embryo reconstructed w/ DNA Typewriter. One animal, zygote to late organogenesis (E13.5). Tree has 1,340,794 transcriptionally profiled, annotated tips (cells), 1,142,588 dated internal nodes, rooted at zygote 1/n
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Judith Kribelbauer @jk-swietek.bsky.social · 30/07/2026
Obviously a strong supporter of this type of tool, but troubled by the literature review. No reference to @chribue.bsky.social work on combinatorial enhancers, and our EXTRA-seq -> kilobase-scale E-P landscapes in a native locus (no minP). Same principle, just ONT.
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Jay Shendure @jshendure.bsky.social · 30/07/2026
New preprint from Shendure Lab on Locus-Scale aka Long-@$$ MPRAs led by the amazing Abby McGee & @carinabiar.bsky.social Most MPRAs test ~300 bp fragments next to a promoter. But real enhancers are bigger, act combinatorially and from a distance. 1/n www.biorxiv.org/content/10.6...
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nellykanata.bsky.social @nellykanata.bsky.social · 28/07/2026
I am very excited to share the work of my PhD with @eddaschulz.bsky.social, now on BioRxiv! 🎉 🧵⬇️ (1/9) How does the transcription↔️chromatin crosstalk ensure monoallelic expression?
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Hiten Madhani @hitenmadhani.bsky.social · 30/07/2026
Next summer's Epigenetics GRC (I'm co-chairing with Deborah Bouch'is) is shaping up nicely with an all-star lineup of speakers working on a broad range of organisms and systems and everything from molecular mechanisms to new phenomena. Apply and put it on your calendar! www.grc.org/epigenetics-...
grc.org
2027 Epigenetics Conference GRC
The 2027 Gordon Research Conference on Epigenetics will be held in Holderness, New Hampshire. Apply today to reserve your spot.
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Igor Ulitsky @igorulitsky.bsky.social · 29/07/2026
Academic tweeps! How do your institutes implement support for scientists in the rapidly changing AI-era - i.e, who is training the students to use Claude Code, and making sure they don't wreckt the cluster? Does it work well? Tell here/DM + pls RT (heading a sub-committee...)
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Elena Torlai Triglia @elett.bsky.social · 29/07/2026
1/ New paper alert! 🎉🧬 Our study on #9p21 gene regulation is out in #CellGenomics: "Chromatin topology and distal elements underlie divergent cell-type-specific regulation of 9p21 locus cell cycle genes" (Torlai Triglia, Miller, et al. www.cell.com/cell-genomic... 🧵
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Nicholas Bellono @nbellono.bsky.social · 09/07/2026
How did octopuses evolve novel traits? Rishav Mitra, Richard Han, Trey Scott, et al serendipitously discover a unique ribosome adaptation that increases the accuracy of protein synthesis and evolved alongside their elaborate nervous systems vs deep sea relatives. www.biorxiv.org/content/10.6...
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Victor Ambros @vambros.bsky.social · 29/07/2026
Yale’s trustees face a decision with profound consequences
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Matthew L. Kraushar @matthewkraushar.bsky.social · 29/07/2026
The US Government aims to defund basic science, dismantle academia & intellectual freedom ➡️ in service of political ideology & corporate interest In its own words 🚨 Was chapters in Project2025 static.heritage.org/project2025/... 🚨 Now official blueprint published www.whitehouse.gov/wp-content/u...
whitehouse.gov
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Piali Sengupta @senguptalab.bsky.social · 28/07/2026
If you don't like a paper, it is obviously totally fine to point out the issues. But please do NOT make egregious and unpleasant comments about the first author's qualifications. A first author who is usually a trainee. Beyond inappropriate and unprofessional.
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Jonathan Froehlich @jjfroehlich.bsky.social · 29/07/2026
Nelly found that transcription-dependent H3K9me3 restricts lncRNA Xist expression to one allele
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bioRxivpreprint @biorxivpreprint.bsky.social · 27/07/2026
Transcription-dependent heterochromatin at the Xist promoter shapes the random choice of the inactive X chromosome www.biorxiv.org/content/10.64898/20…
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Thiago Carvalho @cyrilpedia.bsky.social · 21/07/2026
“It would be sort of confirmation for me that I am useful,” Gonzales said. Alternatively, his absence might successfully promote the group discussion and collaboration he wanted to happen, which he said would also be a “fantastic outcome.”
the-scientist.com
Why One PI Stopped Attending His Own Lab Meetings | The Scientist
By skipping lab meetings, Daniel Gonzales aims to boost engagement and foster group-led discussions among his team.
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Albert Blanch-Asensio @ablanchasensio.bsky.social · 20/07/2026
The STRAIGHT-IN (Dual) kit is now available via @addgene.bsky.social! 🧬 A complete 24-plasmid toolkit for installing up to two orthogonal CLYBL landing pads, DASIT-based enrichment without FACS, and efficient large DNA integration in human cells. Link: www.addgene.org/kits/gallowa... 🧵
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Xiaowei Zhuang's Lab @zhuanglab.bsky.social · 17/07/2026
We developed an in situ RNA amplification method, RT&T-AMP, that uses reverse transcription followed by transcription to generate amplicons at original transcript sites with uniform transcript body coverage, enabling to imaging of short RNA sequences anywhere along transcripts.
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Jeff Vierstra @jeffvierstra.bsky.social · 16/07/2026
You dont need advanced ML models to see base-resolution transcription factor occupancy and element-wise cis-regulatory logic. Just turn to a 40yo technology and basic stats. Still waiting for a structural biologist to help with 3d-modeling of composite regulatory DNA elements from DNase I profiles.
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Jesse Engreitz @jengreitz.bsky.social · 15/07/2026
An encyclopedia of enhancer-gene regulatory interactions — online today! nature.com/articles/s4158… Now with an improved model, expanded maps across 1400+ biosamples, larger validation CRISPR datasets, and guidance on applying the model 1/
nature.com
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Luca Giorgetti lab @FMI @lucagiorgetti.bsky.social · 15/07/2026
Our preprint is now out in @natgenet.nature.com ! doi.org/10.1038/s415... We measured Sox2 promoter bursting dynamics with the SCR enhancer positioned at different distances within a genomic locus devoid of confounding effects in mESC: Main findings in the 🧵 below:
doi.org
Enhancer control of promoter activity and variability via frequency modulation of clustered transcriptional bursts - Nature Genetics
Tünnermann et al. use live-cell imaging to study promoter activity under the control of an enhancer inserted at different genomic distances. RNA production from the promoter occurs in clusters of tran...
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Ekin Deniz Aksu @ekindea.bsky.social · 15/07/2026
I'm excited to share that Corgi is out in @natcomms.nature.com! We refine context-aware sequence-to-function models by using FiLM to condition the model on trans-regulator expression levels. This way Corgi can generalize to unseen cell types. www.nature.com/articles/s41... 🧵Thread 1/n
nature.com
Context-aware sequence-to-function model of human gene regulation - Nature Communications
This study introduces Corgi and Corgi+ , biology-inspired deep neural network models of regulatory DNA sequences that can generalize to unseen cell types. They accurately impute epigenomic d...
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Marieke Oudelaar @mariekeoudelaar.bsky.social · 07/07/2026
We are looking for someone to lead the new Facility for Protein Biochemistry & Biophysics at the MPI of Immunobiology and Epigenetics in Freiburg — please spread the word and apply if you are interested!
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Alex Radzisheuskaya @a-radzisheuskaya.bsky.social · 08/07/2026
1/ Very excited to share the first publication from my lab! In this work, we developed an efficient strategy to precisely mutate mammalian histone genes in their native genomic context using CRISPR prime editing: www.nature.com/articles/s41...
nature.com
Identifying critical lysines in mammalian histone H3 with high-throughput CRISPR prime editing - Nature Genetics
This study uses a precise and efficient clustered regularly interspaced short palindromic repeats (CRISPR) prime editing system to substitute lysine residues in histone H3, individually or in combinat...
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RCSB Protein Data Bank @rcsbpdb.bsky.social · 05/06/2026
Myoglobin Fold (1987) by Irving Geis Used with permission from the Howard Hughes Medical Institute. All rights reserved. Learn more about Irving Geis and his his iconic images of DNA, hemoglobin, and other important macromolecules at PDB-101 pdb101.rcsb.org/sci-...
Geis illustrated the structure of myoglobin, focusing on the folding pattern of the secondary structure of the protein. Unlike previous myoglobin Illustrations, this painting focuses on the tertiary structure of the molecule rather than the sequence or surface.
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RCSB Protein Data Bank @rcsbpdb.bsky.social · 19/06/2026
June 19 is World Sickle Cell Day. Sickle cell anemia is caused by change of a single glutamate to a valine in hemoglobin, which makes the protein prone to aggregation into long filaments. Image of Hemoglobin S by Irving Geis.
Geis illustrates the hemoglobin s molecule as four nearly symmetrically arranged subunits with a mutation present in the beta chain.

Used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.
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Pedro Beltrao @pedrobeltrao.bsky.social · 06/07/2026
My department @eth-dbiol.bsky.social at ETH Zurich is hiring for a tenured professor in mol cell bio and biochemistry (associate/full). The position is within the Institute of Biochemistry (www.bc.biol.ethz.ch) and it is fairly open within their scope of research. www.nature.com/naturecareer...
nature.com
Professor of Molecular Cell Biology and Biochemistry - Zurich, Switzerland job with ETH Zurich | 12861386
The Department of Biology at ETH Zurich invites applications for the above-mentioned tenured professorship at the Institute of Biochemistry
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