jared toettcher

Today I'd like to honor the memory of my mentor and friend, Roger Tsien, born 1952 February 1. Today would have been Roger's 74th birthday.

Most know Roger for his 2008 Chemistry Nobel Prize with Shimomura and Chalfie. Roger made GFP into the versatile imaging method it is now.

Our new paper just out!
pubs.acs.org/doi/10.1021/...

Quantum spin resonance in engineered proteins for multimodal sensing - Nature A recently developed class of magneto-sensitive fluorescent proteins are engineered to alter the properties of their response to magnetic fields and radio frequencies, enabling multimodal sensing of b...

Our research on magneto-sensitive fluorescent proteins and some of their applications has now been published!

Huge thank you to the many many people involved in making this happen. 🧪

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

Just quit Quitting projects in science is hard, but we should be doing a lot more of it.

Blog post: Just quit
Quitting projects in science is hard, but we should be doing a lot more of it.

open.substack.com/pub/arjunraj...

Here's another exciting doctoral project led by Research Group Leader Beatrice Ramm at the Friedrich Miescher Laboratory.

Check the list of other available projects on our website:
lnkd.in/gEMXNQY6
The application portal is open so apply now!

#PhD #IMPRS #graduateprogram #maxplanck

Janelia is hiring! "Invent new imaging methods, molecular tools, or protein chemistry approaches"

www.janelia.org/content/lead...

An elegant sprite!

So happy to announce our new preprint, “A geothermal amoeba sets a new upper temperature limit for eukaryotes.” We cultured a novel amoeba from Lassen Volcanic NP (CA, USA) that divides at 63°C (145°F) 🔥 - a new record for euk growth!
#protistsonsky 🧵

The lab’s first pre-print! We investigated how growth-inducing Erk activity waves are regulated in regenerating zebrafish scales. We discovered that Erk waves are followed by waves of expression of their own inhibitors, as predicted by excitable waves theory. tinyurl.com/26r2cmpj

Reminds me of a guy I knew in grad school who filled out his NCAA bracket based on amino acid hydrophilicity (ignoring non AA letters). D(u)KE always did well :)

Domesticated animals have pulled our heavy carts and turned our large mills for centuries. But what about the opposite end of the spectrum—what if the wheel you want to turn is so small you can’t see it?

Turns out we can harness the power of bacteria to power the world’s smallest machines.

1/7 ⚛️🧪

Senior Director - Scientific Officer Primary Work Address: 4000 Jones Bridge Road, Chevy Chase, MD, 20815 Current HHMI Employees, click here to apply via your Workday account. The Howard Hughes Medical Institute (HHMI) advances the disco...

Great Job - Great Colleagues - Great Science👍
Help us pick the next generation of @hhmi.org Investigators, Freeman Hrabowski Scholars, Hanna Gray Fellows, Gilliam Fellows
Relocation to DC is required, perfect for academic PIs looking for their next chapter
hhmi.wd1.myworkdayjobs.com/External/job...

screenshots of some of the sample implementations

Screenshot of smartmicroscopy.github.io/implementations.html, showing an overview of collected implementation examples

Want to get started with smart microscopy? 🧠🔬
Check out our online repository with implementations from labs and industry -- lots of practical tips and links to sample code! smartmicroscopy.github.io/implementati...

More details in the ✨updated preprint!✨
www.biorxiv.org/content/10.1...

🚀 Our new paper is out @natmethods.nature.com!

Kuffer & Marzilli engineered conditionally stable MS2 & PP7 coat proteins (dMCP & dPCP) that degrade unless bound to RNA, enabling ultra–low-background, single-mRNA imaging in live cells.

🔗 www.nature.com/articles/s41...
🧬 www.addgene.org/John_Ngo/

SCHEPHERD--the bioelectric cell herding platform built for YOU. Single cells, monolayers, organoids--this herds them all + new tricks. Plz try it-- we will *give* you parts! Teaser here of a steering a single cell. GS Yubin Lin's lifeblood with J. Yodh on piano; Celeste R. and Paul K. Thread 1/N

Congrats, Daniel!

Epithelial tension controls intestinal cell extrusion Cell extrusion is essential for homeostatic self-renewal of the intestinal epithelium. Extrusion is thought to be triggered by crowding-induced compression of cells at the intestinal villus tip. In th...

Out in @science.org! We found that the intestine doesn’t just push out cells when crowded. Instead, cells are in a mechanical tug-of-war, and weaker ones are extruded. A new view of how our gut keeps its balance and stays healthy.
www.science.org/doi/10.1126/...

Very excited to be co-organizing this meeting next February. Fellow collective behavior enthusiasts, this one is for you!

Check out those figure making skills! She should do Illustrator tutorials.

On kid number 3 (kid 1 born in my last year as a postdoc) and this has been my weekend schedule for the better part of a decade :)

Latest paper elifesciences.org/articles/107... closes an important cycle in our efforts to study regeneration: week-long recordings allow us to observe the behaviour of cells during the entire course of regeneration in a crustacean leg – bright objects in movie are fluorescent nuclei of cells. 1/6

🤩Wow huge opportunity alert!

And for your Friday afternoon, some in vivo ERK and RTK biosensor eye candy :)

NIH will only accept six applications per PI per calendar year. NIH has issued NOT-OD-25-132 Supporting Fairness and Originality in NIH Research Applications which informs us that NIH will only accept six new, renewal, resubmission, or revision applications fro…

NIH will only accept six applications per PI per calendar year. drugmonkey.wordpress.com/2025/07/17/n...

I was explaining to my Ukrainian colleague the phrase ‘There’s no such thing as a free lunch’. She told me the equivalent in Ukrainian is ‘The only free cheese is in the mousetrap’ - which is so much better

Two new preprints from the @arjunraj.bsky.social‬ on #gastruloids. Both excellent. Exploring the relationship between macroscopic reproducibility v microscopic heterogeneity. Stunning experiments and much to think about
biorxiv.org/content/earl...
biorxiv.org/content/earl...

Molecular recording of cellular protein kinase activity with chemical labeling - Nature Chemical Biology Molecular recorders based on kinase activity-dependent protein labeling track specific kinase activities to understand their link to cellular phenotypes in heterogeneous cell populations and in vivo.

Beautiful work on the development of protein kinase reporters. Congrats all! www.nature.com/articles/s41...

We built pYtags to detect RTK activity in Drosophila embryos and used them to learn about how developmental patterns form bsky.app/profile/emko...

Excited to share that our work building in vivo biosensors for receptor tyrosine kinases (pYtags!) is now out www.cell.com/cell-reports...

Spatiotemporal orchestration of mitosis by cyclin-dependent kinase - Nature Experiments in fission yeast show that cyclin-dependent kinase is first activated in the nucleus, from which the mitotic signal is propagated from CDK at the centrosome to the cytoplasm.

Nature research paper: Spatiotemporal orchestration of mitosis by cyclin-dependent kinase

https://go.nature.com/444lRhe