Trending
Billy's Avatar

Billy

@williamrowell.dev

Geneticist, ersatz programmer, data nerd, comedy lover, and recovering academic. Trying to make it easier for people to analyze and interpret biological data. Bioinformatics Scientist @PacBio.bsky.social

382
Followers
1,404
Following
3
Posts
10.05.2023
Joined
Posts Following

Latest posts by Billy @williamrowell.dev

Post image

New preprint: Hunting for MSI in long-read data with Owl πŸ¦‰

Owl is an MSI caller purpose-built for #PacBio HiFi and integrated into our somatic workflow.

Data:
β€’ Low baseline (~1–5%)
β€’ 15–18% MSI-H instability
β€’ Links GGAA repeats to EWS::FLI1 fusion

Preprint here: bit.ly/4beWECU

12.03.2026 16:30 πŸ‘ 2 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

See you at P165 in 16 minutes. #ACMGmtg26

12.03.2026 14:15 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Happening today at 12:15 PM!

Join Matt Holt at #ACMGMtg26 for his talk on how #PacBio HiFi sequencing enables the discovery of pharmacogenomic haplotypes.

πŸ“ Platform C
⏰ 12:15 PM

Not attending? Learn more about StarPhase for HiFi PGx in this explainer video: bit.ly/4b4ACUA

12.03.2026 12:00 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Post image

Rare Disease Month reminded us why we show up for families and the science driving answers.

We’re not stopping there. Pre-registration is open for Seq It Forward: Run for Rare 5K in June, supporting iHope and rare disease families.

Register: bit.ly/4u33kwB

#SeqItForward5K #PacBio #RareDisease #5K

02.03.2026 16:52 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Video thumbnail

Want epigenetic information automatically included in your sequencing runs?

HiFi sequencing detects 5mC and 6mA directly from native DNA and combines multiple passes of the same molecule to generate long reads with greater than 99.9% accuracy.

See how: bit.ly/3YSPBdo

#PacBio #HiFisequencing

02.03.2026 20:43 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1
Post image

HiFi sequencing can reveal rare and complex variants, but interpretation requires diverse background datasets.

PacBio and DNAstack are supporting the first global federated dataset of HiFi whole genomes through the HiFi Solves Global Consortium.

Details: bit.ly/4kQ0bMk

#WeCareForRare

24.02.2026 16:00 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

By both improving accuracy and unifying assembly-based and mapping-based inferences, the portello approach has the potential to substantially improve analysis for rare-disease and other WGS applications. See our new preprint here:

doi.org/10.64898/202...

20.02.2026 16:12 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Comparison of read mappings at HG002 chr4:40,294,825-40,295,700, showing conventional (pbmm2) read mappings (above) and portello mappings (below). The same set of unaligned input reads were input into each mapping process.

Comparison of read mappings at HG002 chr4:40,294,825-40,295,700, showing conventional (pbmm2) read mappings (above) and portello mappings (below). The same set of unaligned input reads were input into each mapping process.

What if you could improve small variant accuracy, CNV inference, and interpretability of your HiFi WGS data by taking a different approach to read mapping? Our new preprint describes portello, a method which demonstrates the potential for such improvements. (1/5)

20.02.2026 16:12 πŸ‘ 25 πŸ” 11 πŸ’¬ 1 πŸ“Œ 1
Preview
How SPRQ-Nx enables affordable long-read whole genome sequencing without added complexity - PacBio With the introduction of SPRQ-Nx, HiFi sequencing has now become the most affordable long-read sequencing technology to date.

You’ve heard the buzz around a more affordable long-read genome with SPRQ-Nx. Now we’re letting the data do the talking.

Newly published WGS datasets across human, plant, and animal genomes show you don’t need to compromise data quality for affordability.

Explore the data: bit.ly/3O7BAGv

#PacBio

09.02.2026 16:32 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

A first in human genomics: a 4-generation pedigree reference, now in Nature.

Built with #PacBio HiFi, it maps de novo mutation rates, reveals paternal bias, and captures high mutation rates in tandem repeatsβ€”even in Y and repeat-rich regions.

Paper here: go.nature.com/4lGMPlP

#TheresHiFiForThat

24.04.2025 15:34 πŸ‘ 10 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
Preview
Human de novo mutation rates from a four-generation pedigree reference - Nature Analysis of more than 95% of each diploid human genome of a four-generation, twenty-eight-member family using five complementary short-read and long-read sequencing technologies provides a truth set t...

Long-read sequencing of large pedigrees is an ideal way to map all classes of denovo mutations! A collaboration between University of Utah, University of Washington, and PacBio. Glad to be a part of this project πŸ‘

www.nature.com/articles/s41...

23.04.2025 16:11 πŸ‘ 17 πŸ” 9 πŸ’¬ 1 πŸ“Œ 0
Preview
Complex structural variant visualization with SVTopo Structural variants are genomic variants that impact at least 50 nucleotides and can play major roles in diversity and human health. Many structural variants are complex multi-breakpoint rearrangement...

I just released a new preprint! The manuscript describes SVTopo, a software tool that enhances visualization of complex SVs using HiFi data: www.biorxiv.org/content/10.1.... Here’s a summary of the results:

22.04.2025 14:21 πŸ‘ 13 πŸ” 8 πŸ’¬ 1 πŸ“Œ 1
Oh Shit, Git!?!

For starters, the software carpentry lesson (swcarpentry.github.io/git-novice/) is pretty good. When things go wrong, or when you want to dig deeper, I like ohshitgit.com, and more generally, blog posts by Julia Evans related to git: jvns.ca#git

14.04.2025 17:26 πŸ‘ 8 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1
Post image

7500 research staff at the University of California filed a petition to form a union with UAW today at the Public Employment Relations Board in Oakland. While the work is really just beginning, we have had thousands of conversations to get here. We're going to win ✊

12.04.2025 00:22 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Preview
ESHG Conference 2025 ESHG 2022 COVID-19 Information Discover the ESHG 2025 - Hybrid Conference programme. We are proud to announce the confirmed 2025 speakers. Stay updated on matters related to the ESHG soc...

Also worth noting that a substantial new sawfish CNV integration feature will be coming as a preview release on GitHub later this month, which I’ll also be detailing as a poster presentation at ESHG. Looking forward to sharing more about this soon.

10.04.2025 15:41 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
Preview
Sawfish: Improving long-read structural variant discovery and genotyping with local haplotype modeling AbstractMotivation. Structural variants (SVs) play an important role in evolutionary and functional genomics but are challenging to characterize. High-accu

Great to see that sawfish, our new HiFi SV caller, is accepted for publication in Bioinformatics! Sawfish emphasizes local haplotype modeling to improve SV representation and genotyping in both single and joint-sample analysis. Advance-access article now available: (1/n)

doi.org/10.1093/bioi...

10.04.2025 15:41 πŸ‘ 43 πŸ” 24 πŸ’¬ 2 πŸ“Œ 1

Get in Dorks, we are going protesting.

STAND UP FOR SCIENCE. MARCH 7th 12-4pm. DC AND YOUR STATE CAPITALS.

More information to come.

09.02.2025 14:23 πŸ‘ 851 πŸ” 431 πŸ’¬ 40 πŸ“Œ 38

Long-read sequencing resolves the clinically relevant CYP21A2 locus, supporting a new clinical test for Congenital Adrenal Hyperplasia https://www.medrxiv.org/content/10.1101/2025.02.07.25321404v1

11.02.2025 04:40 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Preview
HiFi long-read genomes for difficult-to-detect, clinically relevant variants Clinical short-read exome and genome sequencing approaches have positively impacted diagnostic testing for rare diseases. Yet, technical limitations a…

Have a look at our latest work on PacBio LRS showing its potential as a single technology to accurately identify all types of clinically relevant variants.

www.sciencedirect.com/science/arti...

13.01.2025 16:30 πŸ‘ 10 πŸ” 8 πŸ’¬ 1 πŸ“Œ 0
Preview
GitHub - PacificBiosciences/pb-StarPhase: A phase-aware pharmacogenomic diplotyper for PacBio datasets A phase-aware pharmacogenomic diplotyper for PacBio datasets - PacificBiosciences/pb-StarPhase

β€œStarPhase: Comprehensive Phase-Aware Pharmacogenomic Diplotyper for Long-Read Sequencing Data” is now on biorxiv! In this work, we explore the use of long-read sequencing (#PacBio #HiFi) for #pharmacogenomics #PGx. 1/N

Pre-print: doi.org/10.1101/2024...
Repo: github.com/PacificBiosc...

11.12.2024 14:30 πŸ‘ 19 πŸ” 16 πŸ’¬ 2 πŸ“Œ 3
Post image

ICYMI my poster at #AMPath24, I'm sharing it here. Folks interested in long reads to resolve complex loci like repeat expansions relevant to neuro disease and carrier screening, check it out! @pacbio.bsky.social collab with @egor-dolzhenko.bsky.social @guilhermesena1.bsky.social and many others

23.11.2024 14:59 πŸ‘ 15 πŸ” 8 πŸ’¬ 3 πŸ“Œ 0
Post image

@sedlazeck.bsky.social AMPath24 talk about long reads highlighting TRGT tool by @egor-dolzhenko.bsky.social and @guilhermesena1.bsky.social and others for HiFi sequencing by @pacbio.bsky.social

23.11.2024 19:23 πŸ‘ 17 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
Preview
Careers - PacBio PacBio is always looking to add the best and brightest minds to our world-class company. Our highly interdisciplinary team is best suited for individuals who are creative, forward thinking, and who ap...

If you are a #C++ developer, either have a #bioinformatics or #CUDA background, and take pride in your engineering and/or algorithmic skills, I'm looking for a Senior Staff Engineer at @pacbio.bsky.social. You can work remotely. Feel free to ping me or go to pacb.com/careers

Please spread the word

15.11.2024 15:08 πŸ‘ 14 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
Post image

We can see there's already excitement for Vega on Bluesky. ✨ What do you think about the first #PacBio HiFi benchtop system?

13.11.2024 17:46 πŸ‘ 7 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

I think I'll try hiring @pacbio.bsky.social a #bioinformatics engineer with modern C++ skills. Interested? You can be remote in the US, UK, Germany, or Switzerland. Goals: implement crazy algorithms for on-instrument sequence data processing and improve existing solutions. Contact me.Spread the word

12.11.2024 23:05 πŸ‘ 9 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Waking up in my own normal body and freaking out like the guy who woke up as a bug

09.02.2024 14:58 πŸ‘ 1650 πŸ” 290 πŸ’¬ 25 πŸ“Œ 16

My poster on long read pharmacogenomics with #PacBio HiFi is up for today at #ASHG24. Ping me on here if you want to meet before the poster session!

08.11.2024 16:36 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 2
Preview
Binning meets taxonomy: TaxVAMB improves metagenome binning using bi-modal variational autoencoder A common procedure for studying the microbiome is binning the sequenced contigs into metagenome-assembled genomes. Currently, unsupervised and self-supervised deep learning based methods using co-abun...

A new #metagenomic binning algorithm has appeared: TaxVAMB

Looks like it may outperform SemiBin2 for @PacBio HiFi datasets (human gut). I use the long-read mode of SemiBin2 in the HiFi-MAG-Pipeline and it works great. Time to run some benchmarks!

www.biorxiv.org/content/10.1...

30.10.2024 15:31 πŸ‘ 5 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
Preview
PacBio Announces SPRQ Chemistry for Revio Sequencing Systems, a Major Advance Reducing the Cost of a HiFi Human Genome to less than $500 - PacBio New long-read sequencing chemistry reduces DNA input requirements four-fold, enables a 33% increase in data output per SMRT Cell, improves methylation calling, and expands support for multiomics Trans...

The new #PacBio SPRQ chemistry for the Revio system has some big advantages for micro and #metagenomics:

- Input requirements drop from 2 micrograms to 500 nanograms (per SMRT cell)
- 30% increase yield per cell (~90Gb -> 120Gb)

www.pacb.com/press_releas...

29.10.2024 14:06 πŸ‘ 8 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0
Post image

Interested in long-read pharmacogenomics? Then I have some exciting things to show you at #ASHG24... Looking forward to next week in Denver!

#PacBio #PGx

28.10.2024 20:08 πŸ‘ 8 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0