Garyk Brixi

147 posts

Garyk Brixi banner
Garyk Brixi

Garyk Brixi

@garykbrixi

Building discovery engines for biology. @Stanford · @ArcInstitute

Katılım Kasım 2022
320 Takip Edilen1.1K Takipçiler
Sabitlenmiş Tweet
Garyk Brixi
Garyk Brixi@garykbrixi·
Evo 2 is out in Nature today, showing that genome language models can predict and design across the full complexity of life, from phages to eukaryotes. A few surprises from the project, including how ignoring trillions of nucleotides was key to getting a good model. 🧵
Garyk Brixi tweet media
English
14
206
1K
103.5K
Jassi Pannu
Jassi Pannu@JassiPannuMD·
After a few months of behind-the-scenes work—excited to share that I’m now @biohub's first Director of Frontier Safety. I'll be working alongside our AI and biology leaders to establish this team from the ground up. Keep an eye out for our safety collaborations and research.
GIF
English
13
8
91
5.1K
Garyk Brixi retweetledi
Ava Amini
Ava Amini@avapamini·
protein language models capture rich structural signals, but where that knowledge lives in the network is still unclear we show that small subnetworks inside PLMs encode structural concepts, from residues to folds journals.plos.org/ploscompbiol/a… @PLOSCompBiol work led by @riavinod_!
Ava Amini tweet media
English
0
30
176
15.2K
Garyk Brixi
Garyk Brixi@garykbrixi·
Kalyan and Rohil are pushing at one of the real bottlenecks. The controllable/irreducible risk framing applies upstream too - what kinds of biology become accessible once you have better predictions?
Kalyan Palepu@kalyanmpalepu

Many of the most important drug classes in modern history were nearly abandoned by their financial backers. If we can solve the structural risk-aversion that almost prevented these drugs from getting to patients, then we can dramatically accelerate medical progress.

English
0
0
8
2K
Garyk Brixi retweetledi
Rohil Badkundri
Rohil Badkundri@rohilbadkundri·
We used AI to predict the failure of a Phase 3 trial before the results were announced. Today, we're publishing 10 more predictions for the future. Thread 🧵
GIF
English
50
103
753
251.9K
Garyk Brixi retweetledi
Surya Nagaraja
Surya Nagaraja@snaga13·
Excited to share my postdoc work with @JD_Buenrostro now out in @Nature! "Epigenetic memory of colitis promotes tumour growth" nature.com/articles/s4158… We wanted to understand how transient inflammation can create a long-lived increase in cancer risk, even after full recovery 🧵
English
11
77
360
39.5K
Garyk Brixi
Garyk Brixi@garykbrixi·
@damigupta Nice contextualization with conservation. Linear probing or other interp methods should give cleaner signal than cosine similarity
English
1
0
0
46
Dami Gupta
Dami Gupta@damigupta·
I left out some numbers. Both VIM and DES promoter regions have phastCons scores of 0.84-0.89 — cross-species conservation from multi-species alignment, completely independent of Evo2. These sequences are under purifying selection across mammals. So it’s not just high embedding similarity and shared cell-type activity. The conservation was already there. Evo2 just found it without being told.
English
1
0
1
86
Dami Gupta
Dami Gupta@damigupta·
@arcinstitute @garykbrixi Follow up on my Evo2 analysis: Tested Evo2 embeddings after filtering out repetitive windows. Most high-similarity pairs between different genes had zero sequence similarity (BLAST hits = 0). One standout case: a window in the VIM gene and a window in the DES gene showed cosine = 0.948. Both are active promoters in muscle cells, share key TF binding (CTCF + POLR2A), and VIM/DES are known co-expressed genes. x.com/damigupta/stat…
Dami Gupta@damigupta

@arcinstitute @pdhsu I tested whether Evo2's embedding space could work as a 'semantic BLAST' — retrieval by function instead of sequence alignment. 25 genes, 7B model, 475 windows. Here's what I found: The top of the raw similarity ranking is repeat-driven — L1, Alu, SVA(jumping genes) (1/4)

English
2
0
1
119
Garyk Brixi
Garyk Brixi@garykbrixi·
I'm grateful to @BrianHie and @pdhsu for the scientific environment that makes this possible. Evo 2 was an awesome project in team science, and it's amazing to be at @arcinstitute which enables these multi-institutional collaborations to tackle ambitious problems. Evo 2 couldn't have happened without compute support from @nvidia @NVIDIAHealth.
English
3
1
25
3.5K
Garyk Brixi
Garyk Brixi@garykbrixi·
Evo 2 is out in Nature today, showing that genome language models can predict and design across the full complexity of life, from phages to eukaryotes. A few surprises from the project, including how ignoring trillions of nucleotides was key to getting a good model. 🧵
Garyk Brixi tweet media
English
14
206
1K
103.5K
Garyk Brixi
Garyk Brixi@garykbrixi·
@aditimerch Thanks Aditi! Best genome vibe coder in the game (well, maybe tied for first w @samuelhking, I'll let you two settle that one)
English
0
0
0
99
Garyk Brixi retweetledi
Eric Ho
Eric Ho@eric_ho·
Grateful to have been a part of Evo 2 with the incredibly impressive team at @arcinstitute, now published in Nature. At @GoodfireAI, we've been using the model a ton internally for scientific discovery and have found amazing structure and biology in its internal representations. It keeps surprising us in positive ways!
Garyk Brixi@garykbrixi

Evo 2 is out in Nature today, showing that genome language models can predict and design across the full complexity of life, from phages to eukaryotes. A few surprises from the project, including how ignoring trillions of nucleotides was key to getting a good model. 🧵

English
1
2
16
2.2K
Garyk Brixi
Garyk Brixi@garykbrixi·
Despite training Evo 2 only on DNA, we can use it to design specific functions. By combining Evo 2 with supervised models, we generated sequences with desired chromatin profiles. @BrianHie's thread shows the design process that actually worked in cells! x.com/BrianHie/statu…
Garyk Brixi tweet media
Brian Hie@BrianHie

I wanted to post some fun GIFs from the Evo 2 inference time compute story! In the preprint, we show that we can use Evo 2 to propose sequences and guide generation with Enformer/Borzoi to control aspects of epigenomic architecture. A very simple algorithm that worked well!

English
2
1
25
5.8K