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Ryan Fink

@finkryan.bsky.social
88 followers 98 following 8 posts

PhD Student - Universität Bremen and Universität zu Köln @massecklab.bsky.social Check out our calcium sensor PinkyCaMP: www.nature.com/articles/s41592-026-… Find it on Addgene!

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Reposted by Ryan Fink
Robert Arkowitz @robertarkowitz.bsky.social · 30/09/2026
www.biorxiv.org/content/10.6...
biorxiv.org
Fluorescent proteins misreport ribosome abundance under translation inhibition
Fluorescent proteins are widely used as quantitative reporters of protein abundance in living cells. Here we show that this relationship can break down under translation inhibition: the cellular ribos...
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Reposted by Ryan Fink
Michael Lin, MD PhD @michaelzlin.bsky.social · 29/09/2026
Excited to share a new study from our lab in Cell: “Non-invasive control of gene editing in vivo by photoswitchable Cas12f and focused ultrasound” We engineered a compact CRISPR system that can be activated at specific locations in the body using focused ultrasound (🧵) www.cell.com/cell/fulltex...
cell.com
Non-invasive control of gene editing in vivo by photoswitchable Cas12f and focused ultrasound
Remote activation of a single-AAV-deliverable photoswitchable Cas12f system enables precise spatial and temporal control of genome editing in deep tissues without surgery or implanted devices.
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Rachel Donka @racheldonka.bsky.social · 27/09/2026
🚨New paper alert: Excited to share our journey to contrast how multiple dopamine sensors respond to acute morphine treatment. We first compared changes in dopamine transients in rats prepared with VTA DA GCaMP6f, NAcLS dLight1.3b or GRABDA2h 1/5
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paveltomancak.bsky.social @paveltomancak.bsky.social · 18/09/2026
In light of this growing controversy, I would like to direct attention to the stunning videos 2-31! www.nikonsmallworld.com/galleries/20...
nikonsmallworld.com
A tiny roundworm and a single-celled Dileptus explore their microscopic world | 2026 Small World in Motion Competition
Nguyen Nam Nhat - A tiny roundworm and a single-celled Dileptus explore their microscopic world
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Tommaso Patriarchi @tpatriarchi.bsky.social · 12/09/2026
Consider contributing to a forthcoming special issue of Neurophotonics on Intrinsic Neuromodulation: Measurement, Interpretation, and Links to Brain State and Behavior, which I am co-editing with Jennifer Resnik and Anna Devor.
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Mike Lacy @mlacyphd.bsky.social · 10/09/2026
And check out gevibench.org for comparing and choosing among genetically encoded voltage indicators 👍
gevibench.org
GEVIBench — Voltage Indicator Benchmark
Compare 70 genetically encoded voltage indicators by speed, brightness, sensitivity, and more. Interactive family tree, AP simulator, and spectral viewer.
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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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Omaya Dudin 𓂆 ¦🍉¦🦠¦🔬¦ @dudinlab.bsky.social · 26/08/2026
If some of you are still wondering why we screen randomly purchased antibodies in ExM? Well, cuz we randomely find antibodies labelling key organelles and structures across many species...
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Bita Moghaddam @bita137.bsky.social · 11/08/2026
Love seeing entirely novel findings about dopamine Move over G proteins! Dopamine can regulate glutamate/NMDA directly and without second messenger systems: D2R physically couples GluN2B to suppress NMDA current directly 🤯 (congrats to team from Javitch & Ford labs) www.science.org/doi/10.1126/...
science.org
Dopamine D2 receptors bypass canonical signaling to directly tune NMDA receptor function and aversive learning
Dopamine acts at D2-NMDA receptor heteromers to control glutamatergic transmission and aversive learning.
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Peter Rupprecht @ptrrupprecht.bsky.social · 07/08/2026
Excited to share our work now in Nature Methods! We wrote this manuscript to help others better analyze and interpret calcium imaging data. As a central aspect, we show why nonlinear behavior of calcium indicators matters in practice. Very happy about this work!
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Journal of Cell Biology @jcb.org · 20/07/2026
Michaud, @andrewgoryachev.bsky.social, von Dassow, @xenresearchcenter.bsky.social et al. identify a versatile cortical pattern-forming circuit based on #Rho, F-#actin, Ect2, & RGA-3/4 rupress.org/jcb/article/... 📕 In "Collective Behaviors and Self-Organization in Cells" rupress.org/jcb/collecti...
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🌈 Hailey Piper 🌈 @haileypiperfights.bsky.social · 20/12/2025
Edit of a Simpsons meme showing how sad and lonely Millhouse's Dad Kirk is while Homer can't understand because he is not sad and lonely.
Kirk: I generate ideas in a car bed
Homer: I have my own ideas in a bed with my wife
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Tommaso Patriarchi @tpatriarchi.bsky.social · 08/07/2026
#FENS2026 – Friday 11:30–13:00. Paul Lamothe-Molina @neuronblaze presents nLightG2/nLightR2, next-gen norepinephrine sensors for in vivo use. Come by to talk GPCR indicators, photometry, 2P imaging, multiplexing, or troubleshooting. Poster PS07-10AM-018. Paper: doi.org/10.1038/s415... @PatriarchiLab
doi.org
Next-generation multicolor indicators for in vivo imaging of norepinephrine - Nature Methods
Improved red and green indicators for norepinephrine and their characterization are reported. These indicators allow detection of norepinephrine release in awake behaving mice in dual-color fiber phot...
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Reposted by Ryan Fink
Katherine Copsey @katcopseygreens.bsky.social · 08/07/2026
Gather round for the story of the Very Hungry Data Centre... 🧵 (1/4) #datacentre #ai
A parody of the Very Hungry Caterpillar by Eric Carle. Text reads "The Very Hungry Data Centre" and the image shows a large black-and-brown shape, like a rounded rectangle with the top divided into three 'towers', with a smiling face reminiscent of the Very Hungry Caterpillar in the middle - red with yellow and green eyes.Text reads "One Sunday morning the warm sun came up and - pop! - out of nowhere came a very hungry data centre."

Image shows the VHDC on brown ground with the orange sun rising.Text reads "On Monday he drank a quarter of the city's annual drinking water." 
Image shows a blue shape, with a circle cut out of the middle, reminiscent of the foods with circles cut out in the Very Hungry Caterpillar.Text reads "On Tuesday he ate so much that he doubled demand on the country's power-grid.
So he opened a new gas plant, just for him."
Image shows two yellow spiky shapes representing electricity, also with circles cut out of them.
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BejaLabTechnion @bejalab.bsky.social · 02/07/2026
Photoswitchable optoGPCRs for reversible control of Gs and arrestin signalling www.biorxiv.org/content/10.64898/2026.07.01.735182v1
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Felipe Opazo @opazo.bsky.social · 02/07/2026
New paper! 🚀 A high-affinity anti- #mNeonGreen #nanobody turns #mNG into a #multifunctional Tag. @nanotag.bsky.social decided to openly share the #nanobody for research use. Not common, but we strongly believe well-defined reagents are key for reproducible science. We hope you find it useful! 💚
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Peter Rupprecht @ptrrupprecht.bsky.social · 30/06/2026
Difficult! We can use the Hill equation parameter estimates (GC8s: KD=46 nM, n=2.2; GC6f: 375 nM, 2.3) to compute the fraction of calcium-bound fluorophors as ~1% for GC6f and 55% for GC8s at 50 nM (~neuronal resting). Somehow the bound fraction for GC8s seems too high, though, indicating that ...
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Abhi Aggarwal @abhiaggarwal.bsky.social · 22/06/2026
🟧 Orange is the new green?? 🟧 New sensitive orange calcium indicator (🟠OCaMP) now out in Nature Comms: www.nature.com/articles/s41... Highlights ⚡ Detects single action potentials in vivo 🔬 Optimized for 1030 nm imaging 📸 Highly photostable, minimal photoswitching 🌈 Multiplex with green biosensors
OCaMP Figure 2OCaMP Figure 5OCaMP Figure 6
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DrLachie @drlachie.bsky.social · 12/06/2026
Looking through an old hard-drive and found a file called: "oil_immersion_lens.mp4" - a previously unseen #microscopistsNightmares?
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DZNE research center @dzne.science · 25/05/2026
New paper out: PinkyCaMP: an mScarlet-based calcium sensor with enhanced brightness, photostability and multiplexing capabilities.: Fink, Ryan; Imai, Shosei; Gockel, Nala Eileen; et al. Nature methods Vol. 23, no. 5, p. 998 - 1010 | Thanks for sharing #dzne #papers
dlvr.it
PinkyCaMP: an mScarlet-based calcium sensor with enhanced brightness, photostability and multiplexing capabilities.
Fink, Ryan; Imai, Shosei; Gockel, Nala Eileen; et al. Nature methods Vol. 23, no. 5, p. 998 - 1010
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Michael Lin, MD PhD @michaelzlin.bsky.social · 19/05/2026
Happy to reveal our latest work, Microbe-Independent Deep Assembly and Screening (MIDAS), a method for engineering proteins >10x more cheaply and quickly than before. MIDAS addresses the slowest step in protein engineering — construction and expression of variants — by skipping cloning entirely
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Joachim Goedhart @joachimgoedhart.bsky.social · 19/05/2026
Combining biosensor imaging data with an animated plot of the quantified intensity, based on a blog I wrote earlier: thenode.biologists.com/crafting-plo... In this version I used a dark theme
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Reposted by Ryan Fink
Nature Methods @natmethods.nature.com · 01/05/2026
PinkyCaMP: a red genetically encoded calcium indicator with improved brightness and stability. @massecklab.bsky.social www.nature.com/articles/s41...
nature.com
PinkyCaMP: an mScarlet-based calcium sensor with enhanced brightness, photostability and multiplexing capabilities - Nature Methods
PinkyCaMP is a red genetically encoded calcium indicator with improved brightness and photostability. Derived from mScarlet, it does not exhibit photoswitching upon blue light illumination and is ther...
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Ryan Fink @finkryan.bsky.social · 24/04/2026
PinkyCaMP is finally published!! My first paper co-first authored with @sikmys.bsky.social where we make a great optogenetic and multiplex compatible red calcium indicator. Thank you to @massecklab.bsky.social and @campbell-lab.bsky.social for guiding this journey www.nature.com/articles/s41...
nature.com
PinkyCaMP: an mScarlet-based calcium sensor with enhanced brightness, photostability and multiplexing capabilities - Nature Methods
PinkyCaMP is a red genetically encoded calcium indicator with improved brightness and photostability. Derived from mScarlet, it does not exhibit photoswitching upon blue light illumination and is ther...
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Reposted by Ryan Fink
Evelyn Strickland @strickland-evelyn.bsky.social · 20/04/2026
What if you got to work with some of your best friends on a science project? I can't publish how fun this was, but I can show you the data (🧵)! Last week, we posted our second neutrophil swarming paper to bioRxiv and I wanted to post my favorite videos here~ www.biorxiv.org/content/10.6...
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Joachim Goedhart @joachimgoedhart.bsky.social · 21/04/2026
TIL "dynamic range" is used for two orthogonal biosensor properties. Which one is correct?
Two plots, showing a biosensor response. Both report a 'dynamic range', one referring to the biosensor affinity and one referring to the optical signal.
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Joachim Goedhart @joachimgoedhart.bsky.social · 13/04/2026
📣 New preprint alert! Co-authored by @spalaciosm.bsky.social and @andreacaldarola.bsky.social : Quantitative imaging of calcium dynamics with a green fluorescent biosensor and fluorescence lifetime imaging www.biorxiv.org/content/10.6...
Image of a calcium calibration curve, calcium concentration traces of individual cells and lifetime images of cells
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Ryan Fink @finkryan.bsky.social · 27/03/2026
Such a beautiful example demonstrating the importance of developing and using robust biosensors #FluorescenceFriday
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Tommaso Patriarchi @tpatriarchi.bsky.social · 27/03/2026
Wait… localized norepinephrine transients in the awake visual cortex?! Who would have guessed this neuromodulatory signal is that spatially precise, right where visual processing is happening. Brain state control just got a lot more local. @ruedigersarah.bsky.social www.nature.com/articles/s41...
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 16/03/2026
Science professors and educators all have a role in combating this eugenics resurgence www.sciencedirect.com/science/arti...
Trends in Genetics
Volume 41, Issue 4, April 2025, Pages 261-265
Society Logo
Science & Society
We must not ignore eugenics in our genetics curriculum
Author links open overlay panelMark Peifer 1 2
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https://doi.org/10.1016/j.tig.2025.02.002
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Abstract
Eugenics, that promoted planned breeding to ensure 'racial improvement', was central to the development of genetics and led to horrifying policies. However, eugenics is not dead and continues to influence science and policy today. Thus, we should include eugenics in our undergraduate classes to remind students that scientists must speak out when others lie about science and use it to further their political views.
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Pablo J. Sáez @pjsaez.bsky.social · 16/03/2026
This is why we love #CalciumSignaling Look how mechanical damage triggers long range Ca2+ waves in this plant !! By @annalisabellandi.bsky.social, who is now around here ;) Full www.science.org/doi/10.1126/... @science.org #microscopy #cell #mechanobiology 🧪🔬
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Tommaso Patriarchi @tpatriarchi.bsky.social · 26/02/2026
The most sensitive green and red #norepinephrine #sensors engineered to date are out in #naturemethods! Deeply grateful to all our funders and contributors who made this work possible. A true team effort. @erc.europa.eu @snsf.ch doi.org/10.1038/s415...
doi.org
Next-generation multicolor indicators for in vivo imaging of norepinephrine - Nature Methods
Improved red and green indicators for norepinephrine and their characterization are reported. These indicators allow detection of norepinephrine release in awake behaving mice in dual-color fiber phot...
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Ilhan Omar @ilhanmn.bsky.social · 02/02/2026
Abolish ICE. There’s no reforming it. There’s no compromise. There’s only one way to rein in ICE’s terror campaign. Abolish it.
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Joachim Goedhart @joachimgoedhart.bsky.social · 03/02/2026
Great to see this officially out: An mTurquoise2-Based Glucose Biosensor - works in yeast & mammalian cells and is compatible with FLIM: pubs.acs.org/doi/10.1021/...
pubs.acs.org
An mTurquoise2-Based Glucose Biosensor
Glucose is an important substrate for organisms to acquire energy needed for cellular growth. Despite the importance of this metabolite, single-cell information at a fast time-scale about the dynamics...
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Michael Lin, MD PhD @michaelzlin.bsky.social · 01/02/2026
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.
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Tommaso Patriarchi @tpatriarchi.bsky.social · 18/01/2026
An engineered nanobody inhibitor for molecular-to-circuit control of opioid receptor function. This was a really fun collaboration with @miriamstoeber.bsky.social and @amanglik.bsky.social labs, check it out! www.biorxiv.org/content/10.6...
biorxiv.org
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Mark A. Hanson @hansonmark.bsky.social · 13/01/2026
We've got ISSUES. Literally. We scraped >100k special issues & over 1 million articles to bring you a PISS-poor paper. We quantify just how many excess papers are published by guest editors abusing special issues to boost their CVs. How bad is it & what can we do? arxiv.org/abs/2601.07563 A 🧵 1/n
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allen institute @alleninstitute.org · 07/01/2026
In this mesmerizing video by our #ElectronMicroscopy team, a layer 5 thin tufted neuron is revealed with blue dendrites and purple axon. As it progresses, we zoom into where it connects to a pyramidal cell. Explore our EM data at: microns-explorer.org
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Joachim Goedhart @joachimgoedhart.bsky.social · 19/12/2025
The 'Version of Record' of our paper came out on #FluorescenceFriday elifesciences.org/articles/105...
elifesciences.org
A green lifetime biosensor for calcium that remains bright over its full dynamic range
Directed evolution was used to engineer a green fluorescent biosensor for quantitative calcium imaging that remains fluorescent, yet shows a large change in lifetime in cells.
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Jonas Wietek @jwietek.bsky.social · 05/12/2025
@massecklab.bsky.social @finkryan.bsky.social 🥳👏🧠🐭🔬🧪🩷
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Addgene @addgene.bsky.social · 11/11/2025
Fresh batch of Hot Plasmids here! Find new tools for: 🧠 Neural cell-surface proteomics 🔋 Nerve-to-cancer mitochondrial transfer @greletlab.bsky.social 🔬 Red calcium biosensors @massecklab.bsky.social & @piatkevich.bsky.social ✂️ CRISPRa-AAV for adipocytes @nadavahituv.bsky.social & more!
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allen institute @alleninstitute.org · 17/11/2025
What happens when you combine 10 years of brain data with one of the world’s fastest supercomputers? A virtual mouse cortex simulation, thanks to a global collaboration. 🧠📈 alleninstitute.org/news/one-of-worl…
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Falk Schneider @faldalf.bsky.social · 22/10/2025
mStayRose is published in JBC 🥳🎉 Congratulations @wsctt.bsky.social @sporemohan.bsky.social and team for the monumental effort to make a non-natural amino acid incorporating fluorescent protein accessible. It's based on mStayGold, bright, and photostable: www.jbc.org/article/S002...
jbc.org
StayRose: a photostable StayGold derivative red-shifted by genetic code expansion
Photobleaching of fluorescent proteins often limits the acquisition of high-quality images in microscopy. StayGold, a novel dimeric green fluorescent protein recently monomerised through sequence engi...
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Lucas Farnung @lucas.farnunglab.com · 29/09/2025
New week, new tool: Find our Protein Domain Designer tool to generate publication-ready protein domain diagrams here: domaindesigner.farnunglab.com
Protein Domain Designer tool for the generation of publication-ready protein domain diagrams
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Ryan Fink @finkryan.bsky.social · 29/08/2025
Dying in the weather, but the views in Seoul are incredible
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Ryan Fink @finkryan.bsky.social · 21/08/2025
Very excited to be at the #KSBNS2025 in a few days! I’ll be presenting a poster in the first session (P-097) about our mScarlet based sensor for calcium PinkyCaMP and our developing mScarlet and 5HT1A based serotonin sensor. Stop by to talk and learn about this new generation of red sensors!
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Tanner Fadero @tanner-fadero.bsky.social · 19/08/2025
How many photons are in a GFP? — more than last year, and more than you thought. Here's a simple, cheap, and practical method to break a fundamental limit in fluorescence microscopy. But it only works in light sheet!
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Study of Religion as an Analytical Discipline Workshop @soraaad.bsky.social · 18/07/2025
For those of you attending academic conferences in the U.S., after October 1, 2025 please note the following:
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Yulong Li Lab @yulonglilab.bsky.social · 10/07/2025
(1/3) Excited to introduce our new GRAB sensors for a series of steroid hormones! These tools enable real-time detection of steroid hormone dynamics in vivo🐭🧠. Happy to share these sensors and welcome any feedback! Please contact yulonglilab2018@gmail.com for information.
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