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Alexander Sasse

@lxsasse.bsky.social
277 followers 632 following 7 posts

Learning from algorithms that learn from data about gene regulation.

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Reposted by Alexander Sasse
Alon Goren @agoren.bsky.social · 29/09/2026
1/2 I’m excited to share @edumodolo.bsky.social’s preprint: Discrepancies between ChIP-seq and CUT&Tag histone mark profiles are explained by GC content and chromatin accessibility. www.biorxiv.org/content/10.6...
biorxiv.org
Discrepancies between ChIP-seq and CUT&Tag histone mark profiles are explained by GC content and chromatin accessibility
Chromatin profiling methods, such as ChIP-seq (chromatin immunoprecipitation followed by sequencing), are used to characterize the genomic localization of DNA-associated proteins. While ChIP and ChIP-...
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bioRxiv Bioinfo @biorxiv-bioinfo.bsky.social · 22/09/2026
DeepSCENIC: transfer learning from sequence-to-function models enables causal gene regulatory network inference www.biorxiv.org/content/10.64898/20…
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Cas Blaauw @casblaauw.eurosky.social · 22/09/2026
Excited to show deepSCENIC to the world! GRNs meet sequence-to-function models: explicit TF-region and region-gene links, with the power of enhancer DL models, predicting RNA & ATAC at single-cell resolution. Check out the examples in the paper or try it on your own data: github.com/aertslab/Dee...
github.com
GitHub - aertslab/deepSCENIC: Deep learning for single-cell Gene Regulatory Networks
Deep learning for single-cell Gene Regulatory Networks - aertslab/deepSCENIC
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Martin Pacesa @martinpacesa.bsky.social · 21/09/2026
ʙɪɴᴅᴄʀᴀꜰᴛ2 is out, and we're not waiting for the paper. The full code drops today, free for academic and industry use. We're releasing it early so you can start designing right now, and bring its full power to the current Adaptyv competition. github.com/PacesaLab/Bi...
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Nikolai Slavov @slavov-n.bsky.social · 15/09/2026
Millions of PBMCs have been analyzed by scRNA-seq. Have we seen it all ? We profiled thousands of single PBMCs — proteomes and transcriptomes side by side — and uncovered functional coordination undetectable in the deepest scRNA-seq we could perform. www.biorxiv.org/content/10.6... 1/
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Mike Dorrity @mwdorr.bsky.social · 13/09/2026
🧫 We’re hiring a staff/research scientist to develop new experimental approaches that capture cell state dynamics. Join us in Heidelberg, details + application here: embl.wd103.myworkdayjobs.com/EMBL/job/Hei... Closes September 30th
embl.wd103.myworkdayjobs.com
Laboratory Officer
The Dorrity group at EMBL Heidelberg is seeking a motivated and skilled molecular biologist to join as a Laboratory Officer. Our group uses cutting-edge single-cell genomic techniques to study how cel...
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Philippe Batut @philippebatut.bsky.social · 10/09/2026
🧬🔬 Why are enhancers transcribed and how does that impact gene regulation? I’m really excited to share our new paper in @science.org showing that noncoding RNAs control the timing of gene activation in embryos. With Mike Levine #ScienceResearch @columbiamed.bsky.social A few highlights below... 🧵👇
science.org
Noncoding transcription controls the developmental dynamics of long-range gene regulation
The genomic regions regulating gene expression are often themselves transcribed into a variety of noncoding RNAs (ncRNAs). However, the regulatory roles of this noncoding transcription remain largely ...
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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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Harmit Singh Malik @harmitmalik.bsky.social · 08/09/2026
Science is miraculous. Vaccines are miraculous. Just because we now know (more or less) how they might work does not make them any less miraculous.
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Arnaud Krebs @arnaudkr.bsky.social · 07/09/2026
Is activation of multiple enhancers and promoters coordinated? Short answer is yes. Check full story from @mathias-boulanger.bsky.social @kasitc.bsky.social leveraging long read single molecule sequencing to address this. @embl.org www.cell.com/molecular-ce...
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Kaessmann Lab @kaessmannlab.bsky.social · 31/08/2026
We’re hiring! Experimental #Postdoc and computational and/or experimental #PhD positions in evolutionary genomics are available in our lab in Heidelberg: home.kaessmannlab.org/openPositions Please repost and spread the word!
home.kaessmannlab.org
Kaessmann Lab
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Stand Up for Science! @standupforscience.net · 27/08/2026
Why your doctor can't give you a cure tomorrow: how effective treatments are discovered and developed. Part 1 🧪 🧵 #science #news #education #health #research
Cover graphic titled "Why Your Doctor Can't Give You a Cure Tomorrow" with subtitle "How effective treatments are discovered and developed — Part 1," showing spilled pill capsules, retro curved colored stripes, and a Stand Up for Science logo.
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Arc Institute @arcinstitute.org · 20/08/2026
The 2026 Virtual Cell Challenge has begun! Submissions and the leaderboard are now open. This year's task: multi-context generalization and zero-shot prediction. Models will need to predict perturbation responses in cellular contexts with no training data. arcinstitute.org/news/virtual...
arcinstitute.org
The 2026 Virtual Cell Challenge: predicting perturbation responses in cell contexts a model has never seen | Arc Institute
Registration for the 2026 Virtual Cell Challenge is open at virtualcellchallenge.org. This year the task is zero-shot: we are not releasing a training set, and the evaluation dataset is far more expan...
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Guido Barzaghi @guidobarzaghi.bsky.social · 11/08/2026
📄 That's a wrap 📄 we're excited to share that the latest from @arnaudkr.bsky.social 's lab and Judith Zaugg's lab is at last online at doi.org/10.1038/s415.... Many thanks to my co-first @valentinabaderna.bsky.social and to @embl.org for the wonderful research environment.
doi.org
Cumulative transcription factor binding and p300-mediated histone acetylation drive enhancer activation frequency - Nature Genetics
This study uses single-molecule footprinting to quantify chromatin accessibility at enhancers and promoters in mouse embryonic stem cells and to dissect the contributions of transcription factor bindi...
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Quaid Morris @quaidmorris.bsky.social · 07/08/2026
Excited to share the results of the Codebook Project, an international effort to identify accurate DNA-binding motifs and genomic binding loci for >300 uncharacterized human transcription factors (TFs) www.nature.com/articles/s41...
nature.com
An expanded codebook of human transcription factor DNA-binding specificity - Nature
Results from a panel of assays that analyse different aspects of DNA sequence specificity reveal more than 100 new motifs to aid the characterization of putative human transcription factors.
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Luca Giorgetti lab @FMI @lucagiorgetti.bsky.social · 28/07/2026
Thank you @natgenet.nature.com for this nice Research Briefing www.nature.com/articles/s41... on our recent paper reporting live-cell measurements of Sox2 promoter bursting kinetics when varying its genomic distance from the SCR enhancer 👉 www.nature.com/articles/s41...
nature.com
The genomic position of an enhancer modulates bursting dynamics of the cognate promoter - Nature Genetics
We show that, in a genomic locus with minimal complexity, the distance between promoter and enhancer modulates the frequency of clustered transcriptional bursts. Thus, besides the nucleotide sequence,...
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Giulio Maria Pasinetti, MD, PhD @giuliompasinetti.bsky.social · 24/07/2026
Jian Ma, et al. generated multiscale view connecting genome structure, gene expression, & tissue organization in #Alzheimers. They linked alterations in genome folding to disrupted gene regulation, providing a new layer of insight into biology of #Neurodegeneration. 👉 www.science.org/doi/10.1126/...
science.org
Single-cell multiomics connects 3D genome and transcriptome alterations in Alzheimer’s disease
Alzheimer’s disease (AD) disrupts brain function through cell type–specific transcriptomic and epigenomic alterations, yet the contribution of three-dimensional (3D) genome organization to AD remains ...
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Aaron Sojourner @aaronsojourner.org · 25/07/2026
Admirable clarity @science.org
The Trump administration hates academic science funding, full stop. They hate where that money goes, and they hate who it goes to. They want to keep all that money for themselves, to hand out to favored cronies who can help them get elected and to steer yet more money and more power back into their hands.

That’s it. That’s the story
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Lena Struwe @drgentian.bsky.social · 21/07/2026
"Hence our dismal conclusion: rather than finding that LLMs free us to do a better job of what we were doing before they came along, they shift scientific incentives (and the playing field of academic competition) in ways that compel us to do more and more, faster and faster, less and less well."
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AI x Bio Discovery @aixbiobot.bsky.social · 10/07/2026
Directed evolution of compact synthetic promoters via AlphaGenome and genetic algorithms [new] ...by integrating virtual assay & GFM-guided evolution, iteratively optimizing promoter selectivity, off-target activ., & sequence length.
Figure 3Figure 4Figure 6Figure 5
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Trinobia @trinobia.bsky.social · 19/06/2026
Adding experimental data made RNA structure predictions worse. Not because the chemistry was wrong. Because the signal alignment upstream was noisy. That is the problem segSHAPE was built to fix. www.biorxiv.org/content/10.6... #Trinobia #ComputationalBiology
biorxiv.org
segSHAPE: RNA secondary structure prediction from nanopore direct RNA sequencing
RNAs adopt complex structures that regulate key biological processes, making accurate structure prediction essential. Chemical probing coupled with Nanopore direct RNA sequencing (DRS) offers a route ...
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Michaela Müller-McNicoll @mixmue.bsky.social · 17/06/2026
How can a splicing factor bind to thousands of exons but regulate only a few of them? In our new preprint, we show that SRSF6 resolves this paradox through two distinct binding modes. @lab-nmr.bsky.social & @julianvonehr.bsky.social. Check it out: www.researchsquare.com/article/rs-9...
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Science Magazine @science.org · 14/06/2026
A new Science study shows that bumble bees can position a ball underneath a fake “flower” to reach a reward, suggesting they can exhibit spontaneous problem-solving and challenging the notion that such advanced cognitive abilities are exclusive to large-brained vertebrates. scim.ag/4vs08dC
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Trinobia @trinobia.bsky.social · 13/06/2026
Code and pipeline are open source: github.com/czbiohub-sf/comparison-RNAVelo Paper: journals.plos.org/ploscompbiol... Need help with your single-cell workflows? trinobia.com/contact/ #RNAvelocity #scRNAseq #Bioinformatics #SingleCell #ComputationalBiology
github.com
GitHub - czbiohub-sf/comparison-RNAVelo: Comparison of single-cell RNA Velocity methods in developmental contexts
Comparison of single-cell RNA Velocity methods in developmental contexts - czbiohub-sf/comparison-RNAVelo
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Matthew Taliaferro @jmtali.bsky.social · 11/06/2026
New paper! How do RNAs "know" where to go inside a cell? We dug into the sequence elements that route RNAs to the right place. It turns out that, in mammals, they're surprisingly massive (>200 nt), multipartite, and wonderfully complicated. 🧵
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Martin Steinegger 🇺🇦 @martinsteinegger.bsky.social · 06/06/2026
Folddisco is now published @natbiotech.nature.com. It’s a fast motif search for similar 3D DISCOntinuous residues like catalytic sites or zinc fingers across the entire protein universe. 📄 www.nature.com/articles/s41... 💾 folddisco.foldseek.com​​​​​​​​​​​​​​​​ 🌐 search.foldseek.com/folddisco
nature.com
Structural motif search across the protein universe with Folddisco - Nature Biotechnology
Folddisco enables protein structural motif search in million scale databases.
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Alejandro Montenegro @aemonten.bsky.social · 04/06/2026
What fraction of the human genome is essential for cellular viability? More precisely, how much of the genome is DISPENSABLE for the growth of a haploid cell line? Somewhere between 50 and 96% (nb. as expected). www.biorxiv.org/content/10.6...
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Dan Landau @landau.bsky.social · 04/06/2026
Exciting breakthrough technology from the lab, now live in @cellcellpress.bsky.social ! Instead of cutting the genome where proteins bind (e.g., Cut&Tag), D&D-seq scars the DNA with a deaminase, allowing single cell genome mapping of TFs and chromatin remodellers!
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Vicky C Yang @vcyang.bsky.social · 02/06/2026
Between 1985--2023, MIT's faculty grew 9%. Administrative staff grew 189%. 📈 Why? In new @pnas.org paper, we use dynamical system model to show administrative bloat can emerge without empire-building--just from well-intentioned problem-solving gone awry www.pnas.org/doi/10.1073/...
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Nikolai Slavov @slavov-n.bsky.social · 29/05/2026
Large-scale transcriptomic data across four mammalian species and multiple tissues identify conserved molecular signatures associated with ageing and mortality risk. The integration across species, tissues, perturbations, and interventions is a notable strength.
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ZMBH @zmbh.uni-heidelberg.de · 29/05/2026
The ZMBH welcomes Dr. James Sáenz @jamessaenz.bsky.social as new Professor in Molecular Biology. James previously led a research group at B CUBE - Center for Molecular Bioengineering of Dresden University of Technology.
Portrait of Dr. James Sáenz
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Fabian Theis @fabiantheis.bsky.social · 27/05/2026
Beautiful short Nature Methods N&V “Teaching an old dog new cells” led by J Linder & D Kelley. Also on scooby, pushing seq2func models toward true cell-state–specific reg modeling 🧬 Fitting disc here at CSHL with Anshul & others on this next frontier www.nature.com/articles/s41...
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Bioinformatics Advances @bioinfoadv.bsky.social · 18/05/2026
🔬 New in Bioinformatics Advances: "Refining sequence-to-activity models by increasing model resolution"  Read it here: doi.org/10.1093/bioadv/vbag122 Authors include: @jbuenrostro.bsky.social, @saramostafavi.bsky.social, @lxsasse.bsky.social
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Alejandro Montenegro @aemonten.bsky.social · 26/05/2026
"(...) plasmids are chromatinized in an organized, sequence-dependent manner and adopt a heterogeneous and incomplete chromatin architecture relative to nuclear-encoded chromatin fibers" www.cell.com/molecular-ce...
cell.com
Chromatin architectures underlying plasmid-based assays for regulatory variant effects
Mallory et al. develop plasmid Fiber-seq to map chromatin architecture along individual transfected plasmids at near-nucleotide resolution, which reveals that plasmids adopt heterogeneous chromatin pa...
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William DeWitt @wsdewitt.github.io · 20/05/2026
Game over, phylogeneticists! New DNA foundation model "Carbon" reconstructs the tree of life. 🙃 huggingface.co/spaces/Huggi...
Wildly incorrect phylogenetic tree
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Nature Portfolio @natureportfolio.nature.com · 18/05/2026
A Review in Communications Medicine explores Long COVID — which affects more than 400 million people globally — including current knowledge, gaps and future directions for research, diagnosis and treatment. go.nature.com/4unyxtI #medsky 🧪
This is figure 1, which shows a summary of the pathophysiology of Long COVID.
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James Prendergast @jprendergast.bsky.social · 13/05/2026
🚨 New preprint! How does noncoding variation drive complex traits? We built a massive atlas of cattle regulatory variants (>150k emVars!) and directly tested them in both bovine AND human cells. 🐄🧬🚶‍♂️ Read it here: www.biorxiv.org/content/10.6...
Schema of approach for mapping regulatory elements and variants in cattle and testing their cross-species activity in human cells.
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Jesse Engreitz @jengreitz.bsky.social · 14/05/2026
Why do guinea pigs have so many natural bypass arteries — and mice and humans almost none? We develop in vivo Perturb-seq for endothelial cells to ask how protective collateral arteries are built. Preprint with by Irene Fan, Ronghao Zhou, and Kristy Red-Horse: www.biorxiv.org/content/10.6...
A Perturb-seq screen guided by species divergence uncovers pathways for collateral artery formation
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Marvin Tanenbaum @marvintanenbaum.bsky.social · 13/05/2026
For 40 years the 8-nt ‘Kozak Sequence’ was thought to mark sites of translation initiation. In a new study, we revise this model by identifying an ~80-nt sequence—the extended Translation Initiation Sequence (eTIS)— that guides ribosomes to correct start sites. 🧵 www.biorxiv.org/content/10.6...
biorxiv.org
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Kaessmann Lab @kaessmannlab.bsky.social · 08/05/2026
Huge congrats from our whole lab to Sir David Attenborough on his 100th birthday!!! 🎉🥳❤️ I had the honor of meeting him - and being interviewed by him - in 2013 for his BBC documentary "Rise of Animals: Triumph of the Vertebrates", which featured part of our work.
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Schubeler Lab @schubelerlab.bsky.social · 07/05/2026
Excited to share our new study on CpG islands (CGIs) regulation by transcription factors (TFs)! CGIs drive most transcription initiation with unclear regulation. We find that chromatin-opening TFs are key players—following a surprisingly simple rule. 🧵 www.biorxiv.org/content/10.6... 1/9
biorxiv.org
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Vijay Ramani @vram142.bsky.social · 06/05/2026
Delighted to share our lab's latest (w/ inimitable @genophoria.bsky.social) in final form at @nature.com. Enormous lift by Sean Wang, @palindromephd.bsky.social & @martyyang.bsky.social to address extensive & constructive reviewer comments & see this through. (1/n) www.nature.com/articles/s41...
nature.com
Pervasive and programmed nucleosome distortion on single chromatin fibres - Nature
An analytical pipeline called Iteratively Defined Lengths of Inaccessibility (IDLI) maps the genome-wide occupancy of a range of nucleosome types and shows that most nucleosomes exhibit programmed ‘di...
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Maxim Greenberg @maxvcg.bsky.social · 01/05/2026
This a very important, and extremely well-executed study from Ralph Grand’s group @uniheidelberg.bsky.social. Congrats to all the authors! www.biorxiv.org/content/10.6...
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Alexander Sasse @lxsasse.bsky.social · 25/04/2026
Modeling Dynamics, Cell Type Specificity, and Perturbations in Gene Regulatory Networks - www.annualreviews.org/content/jour...
annualreviews.org
Modeling Dynamics, Cell Type Specificity, and Perturbations in Gene Regulatory Networks
Gene regulatory networks (GRNs) define the regulatory relationships among molecules such as transcription factors, chromatin remodelers, and target genes. GRNs play a critical role in diverse biologic...
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Sushmita Roy @sroyyors.bsky.social · 25/04/2026
Very happy to see this review online annualreviews.org/content/journa… where we review current approaches and challenges in GRNs with a focus on dynamics, perturbations and cell type specificity.
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James Lloyd 🧬 @jamespblloyd.bsky.social · 24/04/2026
I wanted to share my new Spotlight in @cp-trendsgenetics.bsky.social that highlights a terrific paper linking gene body methylation with noise in gene expression: Silencing the noise with gene body methylation doi.org/10.1016/j.ti...
Figure from journal article with graphic showing that genes with methylation in the body have lower noise (variation in expression) than when methylation is removed.
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Harmit Singh Malik @harmitmalik.bsky.social · 21/04/2026
A herculean effort by many, but esp. the first three authors: Ujjwal Rathore, Eli Dugan, and Hunter Thornton working in the Krogan and Marson labs, with a veritable army of collaborators from HARC (harc.ucsf.edu) and beyond. Press release: gladstone.org/news/scienti... (inc. paper link)
gladstone.org
Scientists Map How HIV Hijacks Human Cells—and How Cells Can Fight Back
A new genetic roadmap reveals hundreds of hidden players in HIV infection, including two proteins that stop HIV in its tracks.
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Simon Hammann @simonhammann.bsky.social · 20/04/2026
Don't be shy to take on a little two-week side project. These five months will be the most precious three years of your academic journey.
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Alex Lu @alexijie.bsky.social · 18/04/2026
Check out how we exploit observations of homology from evolution to design enhancers, even when we don't have prior knowledge or ability to specify function!
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Alexandra P @alexanrna.bsky.social · 16/04/2026
1/ 🧬 Happy to share our new preprint on modeling cis-regulatory variation in human brain enhancers across a large Parkinson’s disease cohort: www.biorxiv.org/content/10.6... Details in the thread below:
biorxiv.org
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