The hottest Molecular Biology Substack posts right now

And their main takeaways
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Top Science Topics

The Good News Is That One Side Has Definitively Won The Missing Heritability Debate

Astral Codex Ten • 27599 implied HN points • 03 Dec 25
🔬 Science Molecular Biology
  1. Recent research shows that most traits are influenced by genetics, but researchers still can't agree on how much. Some studies suggest up to 80% heritability, while others find it closer to 30%.
  2. The new study used advanced genetic analysis on a large number of people, capturing 88% of the heritability gap previously unexplained by genetics. However, this still leaves a significant portion unaccounted for.
  3. There's a divide in how people interpret the results: some believe this study supports the idea of many rare genetic variants influencing traits, while others think it confirms that heritability might not be very high to begin with.

A Visual Guide to DNA Sequencing

Asimov Press • 851 implied HN points • 26 Feb 26
🔬 Science Molecular Biology
  1. DNA sequencing has moved from slow, radioactive lab work to fast, automated machines, causing sequencing costs and turnaround times to fall dramatically.
  2. Different technologies make trade-offs: some (like Illumina) give very accurate short reads, others (like PacBio and nanopore) produce long reads useful for repetitive or complex regions, and nanopore adds portability and real-time reading.
  3. These advances have revolutionized biology and medicine by enabling large-scale genome projects, clinical genetic testing, ancient DNA and metagenomics studies, and ongoing efforts to make whole-genome sequencing even cheaper and more widely available.

Countable Labs

ASeq Newsletter • 14 implied HN points • 19 Mar 26
🔬 Science Molecular Biology
  1. Countable Labs is building a novel PCR instrument that acts like digital PCR but runs inside a single tube.
  2. Their method seems to isolate individual molecules in a gel, amplify them, and image the fluorescence directly in the tube to enable multiplexed detection.
  3. Public details are limited, so people are looking through patents to understand the technical specifics.

The Origins of Agar

Asimov Press • 373 implied HN points • 22 Feb 26
🔬 Science Molecular Biology
  1. Agar is the lab staple that lets scientists grow and isolate microbes, and it made modern techniques like vaccine production, antibiotic testing, and many discoveries possible.
  2. Most lab-grade agar comes from wild-harvested Gelidium seaweed, so its supply is fragile — wartime shortages, overharvesting, climate change and recent contaminated or scarce batches have driven price spikes and alarms.
  3. Researchers have tested many substitutes, but no alternative matches agar’s combination of firmness, transparency, low cost and ease of use, and labs stick with agar because decades of methods and standards depend on it.

Signal Biosciences

ASeq Newsletter • 21 implied HN points • 17 Mar 26
🔬 Science Molecular Biology
  1. They’re building a high-plex PCR approach that runs on standard qPCR and dPCR machines, already showing up to 15 targets in dPCR and a 7‑target qPCR prototype, with aims of roughly 50 and 40 targets respectively.
  2. The key idea is to move fluorescent signal generation out of the genomic amplification and into a parallel isothermal secondary reaction; probe cleavage during PCR produces a cleaved tail that triggers separate signal‑generating chemistries, effectively acting like a barcode.
  3. By decoupling signal chemistry from amplification and pooling fluorophores separately, the method could let developers multiplex many targets in a single reaction without needing specialized instrumentation.
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Sarmal - FLASH Sequencing!

ASeq Newsletter • 14 implied HN points • 18 Mar 26
🔬 Science Molecular Biology
  1. Sarmal is a new company working on DNA sequencing and is pitching a technology called FLASH.
  2. FLASH stands for Fluorescence Activation by Serial Hybridization and is described as involving a polymerase, but the explanation and figure are unclear.
  3. There is a patent for the technology, and deeper details are gated behind a paid subscription paywall.

Puzzling out elephant longevity

Trevor Klee’s Newsletter • 2014 implied HN points • 07 Dec 25
🔬 Science Molecular Biology
  1. Elephants' low cancer rates and long lives are tied to many non-identical TP53 copies—retrogenes and a reanimated pseudogene—that work together with their immune and DNA-regulatory systems.
  2. Other long-lived animals like bats use different strategies, emphasizing DNA repair and immune modulation along with regulated p53 activity rather than just more cell-suicide signals.
  3. Longevity is multi-factorial and species-specific, so a single explanation (like extra TP53 copies) is incomplete and can't be copied into another species without integrating many other systems.

Metaphors for Biology: Time

Asimov Press • 515 implied HN points • 28 Jan 26
🔬 Science Molecular Biology
  1. Biological events occur across an enormous range of speeds — from ultrafast molecular vibrations and ion channel openings to much slower diffusion and chemical reactions.
  2. Proteins are built, folded, act, and decay on wildly different schedules — transcription and translation can take seconds to days in the metaphor, enzymes can be lightning-fast or slow, and protein lifetimes range from minutes to millions of years.
  3. Comparing biology to human technology and behavior emphasizes these contrasts: electronics and engines can outpace many protein machines, neural processing and muscle movement dominate reaction time, and the full span of biological time covers roughly 24 orders of magnitude, so evolution needs a different time metaphor.

BGI Nanopore Peptide Profiling

ASeq Newsletter • 21 implied HN points • 10 Mar 26
🔬 Science Molecular Biology
  1. BGI demonstrated a scaled-up method for classifying peptides with nanopores, showing the approach works beyond small proofs of concept.
  2. They attach DNA handles to peptide ends so peptides can be threaded and paced through a nanopore using existing DNA sequencing control.
  3. The study revealed more technical detail about BGI’s nanopore platform, indicating it could be adapted for larger-scale protein or peptide analysis.

Mystery of the Head Activator

Asimov Press • 328 implied HN points • 18 Jan 26
🔬 Science Molecular Biology
  1. A small peptide called the “head activator” was reported to trigger head regeneration in hydra and was even sequenced and sold as a synthetic compound, but many labs couldn’t replicate the effect and later genomic and proteomic data show that sequence isn’t encoded in hydra, undermining the original claim.
  2. The controversy became deeply personal and institutional, leading to accusations, a formal inquiry and fines, missed career opportunities, and lasting grudges among researchers involved.
  3. Meanwhile, hydra patterning is now better explained by established ideas like the Gierer–Meinhardt model and Wnt signaling, illustrating how science self-corrects even though the true origin of the originally reported peptide remains an unresolved puzzle.

Solving the Electroporation Bottleneck

Asimov Press • 335 implied HN points • 15 Jan 26
🔬 Science Molecular Biology
  1. Electroporation has a huge space of possible settings, so getting DNA into non-model microbes is often slow, hit-or-miss, and leaves researchers unsure why experiments fail.
  2. A robotic electroporator that tests many buffers, voltages, waveforms, and plasmid origins—and uses a Bayesian optimizer to choose conditions—can rapidly find working protocols and massively improve transformation efficiency.
  3. Scaling cultivation and transformation for diverse microbes will open up study and engineering of vast, untapped biological diversity, leading to new enzymes, tools, and biotech applications beyond standard lab organisms.

The Biological Argument against LNT

Gordian Knot News • 183 implied HN points • 21 Jan 26
🔬 Science Molecular Biology
  1. DNA is fragile and gets damaged thousands of times per cell every day, but cells have powerful, diverse repair systems that undo most of that damage, so you can’t assume radiation damage is simply cumulative and unrepairable.
  2. The LNT model stays dominant by leaning on noisy exposure data and rhetorical traps that shift the argument away from biology, allowing critics to be boxed into defending vague "safe dose" ideas instead of disproving the model; clear counterexamples (like the radium dial painter cases) contradict LNT.
  3. To replace LNT we must focus on the biology, use strong, high-dose or distinct-exposure counterexamples, avoid vague safety rhetoric, and adopt a well-defined, computable harm model that accounts for DNA repair.

Why Engineer Biology?

Niko McCarty • 39 implied HN points • 10 Sep 24
🔬 Science Molecular Biology
  1. Cells can help solve big problems like hunger and climate change by using chemistry and physics to rearrange atoms into useful materials. They are like natural tools that can be engineered to do tasks we need.
  2. Engineering biology has a successful history, like when Norman Borlaug improved wheat crops in Mexico. These achievements show that one innovative solution can make a huge difference over time.
  3. Now is a great time to work in biotechnology because tools for studying and changing genes are getting cheaper and easier to use. This means more people, from different backgrounds, can contribute to solving biological challenges.

DNA And Protein Sequencing Companies

ASeq Newsletter • 58 implied HN points • 02 Feb 26
🔬 Science Molecular Biology
  1. Protein sequencing is becoming a growing startup space, with many companies now working to make protein readouts practical.
  2. Two main technical routes dominate—optical methods and nanopore-based sequencing—while a smaller set of firms pursue other novel approaches, and multiple companies are active in each category.
  3. An updated directory of DNA sequencing companies is maintained, and contributors are invited to share additional firms to keep the list current.

A Biologist's Guide to Biotech

A Biologist's Guide to Life • 22 implied HN points • 12 Feb 26
🔬 Science Molecular Biology
  1. Biotechnology—from ancient agriculture to modern medicine—powers food and health and has transformed human society and life expectancy.
  2. Research tools like sequencing, PCR, CRISPR, and lab automation accelerate discovery and are often easier to commercialize than whole crops or drugs because they avoid heavy clinical and scaling barriers; selling them means convincing scientists they cut costs or enable new, publishable work.
  3. Building biotech companies is very different from building software: it requires lab space, expensive reagents, patents, regulatory know-how, and often partnerships with big ag or pharma, so science training should better prepare people for these practical business and legal realities.

Sequencers From Singapore? No. But Interesting!

ASeq Newsletter • 14 implied HN points • 12 Feb 26
đź•ą Technology Molecular Biology
  1. AITBioTech is selling a small DNA sequencer (ABSEQ) with iSeq/MiSeq-level specs, but it appears to be a rebranded DNBSeq device using the same luminescence-based chemistry.
  2. Their qPCR system also looks like an OEM product from Taiwanese manufacturers, indicating the company rebrands existing instruments rather than building wholly new hardware.
  3. Rebranding and OEM sourcing is common in the sequencing industry, and while OEMs could eventually offer customized, integrated instruments for clients, that kind of tailored integration probably isn’t imminent.

Androgenetic haploid selection

De Novo • 77 implied HN points • 17 Nov 25
🔬 Science Molecular Biology
  1. Eggs are rare and expensive, which limits how many embryos we can select from for genetic improvement. Finding a way to effectively use sperm could change this.
  2. The proposed method involves making eggs, removing their DNA, and then adding sperm to create cell lines. This lets us select the best genetic traits without wasting sperm.
  3. This approach could improve the chances of getting better traits from the father side and could work even with low-quality techniques for making eggs.

No human genes have truly 100% penetrance

Trevor Klee’s Newsletter • 970 implied HN points • 10 Nov 24
🔬 Science Molecular Biology
  1. No human genes have 100% penetrance, meaning not all who have a certain gene will show the related traits. This makes predicting health outcomes based on genetics challenging.
  2. Genetic diseases like Huntington's seem like they have high penetrance, but variability in symptoms and onset can make them unpredictable. It highlights the complexity of genetics beyond simple Mendelian traits.
  3. The body's systems, especially the immune system, add layers of complexity that affect how genes express themselves. This makes it really hard to guarantee that a specific gene will always result in the same outcome.

Inso Biosciences

ASeq Newsletter • 7 implied HN points • 18 Feb 26
🔬 Science Molecular Biology
  1. They developed a fluidic micropillar system that separates DNA using microfluidic flows.
  2. The tech is focused on preserving and recovering high‑molecular‑weight (long) DNA for long‑read nanopore sequencing.
  3. The aim is a fast, integrated microfluidic sample‑to‑library workflow to speed up nanopore sequencing preparation.

Let’s Sequence the Bennu Samples

Viruses Must Die • 52 implied HN points • 06 Dec 25
🔬 Science Molecular Biology
  1. Samples from the asteroid Bennu contain DNA bases and amino acids, so the rock carries familiar building blocks of life.
  2. If life can travel between worlds, Earth-style DNA sequencing might actually detect it, so teams should try sequencing Bennu material despite contamination concerns because any truly novel sequence would be decisive.
  3. The amino acids are mostly racemic but show an excess of left-handed valine, which could hint at a biological origin but is ambiguous due to racemization, making sequencing an especially important follow-up.

Cancer-Selective, Pan-Essential Targets from DepMap

Rough Diamonds • 20 implied HN points • 09 Jan 26
🔬 Science Molecular Biology
  1. Large-scale DepMap screening can flag genes whose knockout strongly harms many cancer cell lines but not immortalized "normal" lines, yet these results are limited by dataset definitions (many hits fall on DepMap's "pan-essential" list) and by the poor representation of healthy human tissues in culture, so experimental validation is needed.
  2. The top candidates include both familiar chemotherapy targets and new leads: some targets already have clinical-stage inhibitors or ADCs (e.g., TFRC, NMT1), while others (e.g., YRDC, SEPHS2, PHF5A, ADSL) are preclinical or underexplored and could be druggable by different modalities.
  3. LLM-generated code (Claude Code) made the project fast and reproducible, but agent-produced code can silently change behavior or omit checks, so careful human review, testing, and follow-up biological experiments are essential.

DNA in Covid-19 vaccines: 7 pieces of context missed from Florida Surgeon General’s unnecessary warning

Your Local Epidemiologist • 1815 implied HN points • 05 Jan 24
🏥 Health & Wellness Molecular Biology
  1. The amount of DNA fragments in Covid-19 vaccines is relatively small compared to other particles.
  2. DNA fragments are present in all vaccines and various medical treatments, and are kept at minimal levels for safety.
  3. Human bodies have natural mechanisms to deal with foreign DNA and prevent integration into our genes.

Mitochondria Are Alive

Asimov Press • 735 implied HN points • 08 Nov 24
🔬 Science Molecular Biology
  1. Mitochondria are more than just cell parts; they are alive and have their own functions. They carry their own DNA and replicate just like bacteria.
  2. Thinking of mitochondria as living beings can help us understand their role better in our health and in biology. Many diseases are linked to problems with mitochondria.
  3. Mitochondria can interact with their environment and even move between cells, which shows they can adapt and play important roles in complex biological systems.

Brave new human: counting up the de novo mutations you alone carry

Razib Khan's Unsupervised Learning • 148 implied HN points • 14 Jun 25
🔬 Science Molecular Biology
  1. The study looks at how many new mutations each person has that are different from their parents. These mutations happen in our DNA over generations.
  2. Mutations in our genetic code can impact traits and diseases. Some mutations are common, while others are rare and can lead to various health problems.
  3. Advancements in technology have made it easier to study our DNA. We can now look at thousands of genetic markers that help us understand human history and evolution.

Francis Crick Was Misunderstood

Asimov Press • 386 implied HN points • 01 Dec 24
🔬 Science Molecular Biology
  1. The Central Dogma explains that information in cells flows mainly from DNA to RNA to proteins, but it's more complex than just that. It actually includes several other information transfers that many people don't realize.
  2. Francis Crick named his idea the Central Dogma, but it’s not an unchangeable belief; it's a scientific hypothesis based on evidence. Even though people often misunderstand it, he believed in testing ideas with experiments.
  3. Recent discoveries show that some processes in biology may seem to contradict the Central Dogma, but they don't actually break its rules. The essential point is that information can only flow from nucleic acids to proteins, never the other way around.

LatchBio Now Provides Lots of Data

LatchBio • 82 implied HN points • 27 Jun 25
🔬 Science Molecular Biology
  1. LatchBio has created a massive cell atlas with 30 million samples covering 150 diseases and 200 tissues. This helps researchers access diverse biological data easily.
  2. They partnered with Pythia Biosciences and Miraomics to enhance data curation and improve how this information is delivered to users.
  3. The introduction of a new Python framework helps scientists curate data more efficiently, making it easier to handle complex biological information.

Genopore Update

ASeq Newsletter • 7 implied HN points • 07 Jan 26
đź•ą Technology Molecular Biology
  1. A recent website update aligns with earlier patent-based speculation about their nanopore protein-detection design.
  2. They published a new patent that adds technical detail and indicates continued development.
  3. Detailed discussion is locked behind a paid subscription, so full information is not publicly available.

Nautilus Early Access

ASeq Newsletter • 14 implied HN points • 25 Nov 25
🔬 Science Molecular Biology
  1. Nautilus has been pushing an early-access program and that push seems to have increased market interest by showing the platform can support early-access projects.
  2. A recent scientific demo focused on Tau proteoforms (about 768), which is a useful small-scale result but doesn’t demonstrate the claimed ability to interrogate billions of wells or many different proteins.
  3. Because the demo was small, it’s unclear how well the high-density patterning and machine-learning pattern matching perform at scale, so fuller multi-protein or high-well-count demonstrations are needed.

Dear Shambolic Oligarchs: Here’s What I Did This Week

Viruses Must Die • 96 implied HN points • 25 Feb 25
🔬 Science Molecular Biology
  1. There's a plan to create a vaccine for chickens using yeast to help them fight bird flu. This involves some complex science but aims to protect poultry.
  2. Efforts are underway to upload massive amounts of viral data to a federal cloud, making it easier for scientists to access crucial information. However, workplace issues are causing worries about delays.
  3. A colleague discovered a cancer treatment but was let go during a staff change, which highlights the challenges faced by dedicated scientists and the impact of workplace stress on their work.

The CycloneSeq 40K Pores? 400Gb/Run?

ASeq Newsletter • 7 implied HN points • 17 Dec 25
🔬 Science Molecular Biology
  1. BGI’s CycloneSeq claims to use novel motor and pore proteins found in extreme ocean environments as the core components for its nanopore sequencing chemistry.
  2. The device reportedly uses a spider-web-inspired, nano-imprinted micro-well chip design to achieve ultra-low electrical noise and stable membrane embedding, enabling very long sequencing runs (up to about 107 hours).
  3. Slides and coverage suggest high throughput — on the order of tens of thousands of pores and around hundreds of gigabases per run (e.g., ~40K pores and ~400 Gb/run) — implying significant per-run data yield if accurate.

EviziaDx PRECYSE - An AFM for DNA QC

ASeq Newsletter • 29 implied HN points • 22 Aug 25
🔬 Science Molecular Biology
  1. EviziaDx PRECYSE is a new tool for checking the quality of DNA samples using advanced imaging techniques. It allows scientists to see individual molecules and measure their lengths accurately.
  2. This tool uses atomic force microscopy (AFM), which is quite expensive and needs special conditions to work properly. Despite these challenges, the images produced are very fascinating.
  3. Instead of traditional methods like electrophoresis and UV-spectroscopy, this technology offers a more detailed look at DNA fragments, pushing boundaries in DNA quality control.

Praetorian PTEN: Protecting Cells from Cancer

Holodoxa • 39 implied HN points • 24 Aug 23
🔬 Science Molecular Biology
  1. PTEN acts as a crucial barrier against cancer growth by regulating cell growth and proliferation.
  2. The structure of PTEN, spanning 105 thousand DNA base pairs on chromosome ten, reveals its functional capabilities and how it interacts with cellular components.
  3. PTEN's loss of function, often due to mutation, influences the PI3K/AKT/mTOR pathway, impacting cellular signaling and potentially leading to tumorigenesis.

Single molecule imaging of the central dogma reveals myosin-2A gene expression is regulated by contextual translational buffering

Axial • 22 implied HN points • 10 Dec 24
🔬 Science Molecular Biology
  1. Researchers created a special cell line to study how the MYH9 gene works, focusing on its role in myosin-2A production. This new approach allows them to see all stages of gene activity with high precision.
  2. The study found that changes in the cell cycle can affect how MYH9 is expressed, especially during cell division, helping to control when myosin-2A is made.
  3. They also discovered a 'buffering' system that adjusts protein production based on how much RNA is available, showing how cells adapt their response to different situations.

Functional protein mining with conformal guarantees

Axial • 14 implied HN points • 28 Nov 24
🔬 Science Molecular Biology
  1. A new method is developed for predicting protein functions using something called conformal prediction. This makes the predictions more reliable and provides a clear way to understand risks when selecting proteins.
  2. The approach helps in annotating genes and predicting enzyme functions more accurately without needing new training models. This is great for speeding up research in life sciences.
  3. It also offers a smart way to reduce the number of proteins needing full analysis, making the process quicker and cheaper while still keeping good accuracy.

Birth of protein folds and functions in the virome

Axial • 14 implied HN points • 24 Nov 24
🔬 Science Molecular Biology
  1. A lot of viral proteins have unique structures, showing there's still much to discover in the viral world. More than half of these proteins are structurally different from anything we've seen before.
  2. Some viral proteins are surprisingly similar to human proteins, which allows viruses to trick our cells. This understanding could lead to new ways to combat viral infections.
  3. Using advanced techniques to study protein structures is really powerful. It can reveal function and relationships that traditional methods might miss, helping us understand viruses better.

Unbiased mapping of cereblon neosubstrate landscape by high-throughput proteomics

Axial • 14 implied HN points • 24 Nov 24
🔬 Science Molecular Biology
  1. A new method helps find powerful compounds that can target hard-to-reach proteins for drug development. These compounds are called molecular glue degraders, and they can help break down unwanted proteins in the body.
  2. The study found many new targets for these compounds, including some that haven't been studied much before. This expands the potential for developing new treatments for diseases like cancer.
  3. The researchers created a process that combines different scientific techniques, making it easier to design and improve these drugs. This means we might see more precise and effective medicines in the future.

In vivo photoreceptor base editing ameliorates rhodopsin-E150K autosomal-recessive retinitis pigmentosa in mice

Axial • 14 implied HN points • 23 Nov 24
🔬 Science Molecular Biology
  1. Researchers are using CRISPR technology to fix a genetic mutation that causes a type of blindness in mice. This mutation is in the rhodopsin gene, which is important for vision.
  2. Timing is really important for the treatment to be effective. Treating mice earlier resulted in better preservation of their eyesight compared to treating them later.
  3. Despite progress, there are challenges in translating this therapy for humans. The mutation is rare, making it tough to conduct clinical trials, and the therapy needs further development for success.