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Antimycin A found its roots back in the 1940s. Japanese scientists, digging through the wealth of natural substances produced by Streptomyces bacteria, stumbled onto this compound during a time when the world seemed obsessed with unlocking new antibiotics. The process felt a lot like panning for gold and being surprised by an odd-colored pebble. Most researchers at the time sought out broad-spectrum fighters against bacterial infections, but antimycin showed its true colors as something else—a respiratory chain inhibitor. Early on, chemists learned that this fish-killing substance had a knack for stopping the energy factories inside cells, targeting the mitochondrial electron transport chain at complex III. People marveled at its tightly targeted disruption, surprised that a soil microbe could evolve such precision.
Antimycin A stands out in a crowded field of natural products. It isn't just another off-the-shelf antibiotic. In laboratories, it often plays the villain to living cells, acting as a powerful tool for cell biologists probing mitochondria. Think of it as a wrench thrown into cellular power plants—this is less about curing infections and more about exposing how fundamental processes break down. With a molecular formula of C28H40N2O9, antimycin appears as a yellowish, crystalline solid. Its role in agricultural settings as a fish poisoning agent is secondary to its reputation among researchers as a pure interrupter of bioenergetics.
Antimycin A displays some interesting traits once you dig below the surface. With a melting point hovering around 116–118°C and solubility in organic solvents rather than water, it requires careful handling. The structure boasts a nine-membered dilactone ring with several side chains that create a landscape unfamiliar to many small molecules. These properties give it enough stability for long shelf lives in the lab, but they also complicate formulation for any practical field use. Its chemical backbone makes it susceptible to hydrolysis and other transformations, which is partly why it rarely appears outside the lab in a pure state.
Researchers expect accuracy from labels, and antimycin A typically features a purity threshold above 95% for experimental use. Solutions come in varying concentrations, often dissolved in DMSO or methanol. Warnings cover its toxicity to fish and mammals, and labeling precautions advise against ingestion, skin contact, or inhalation. Because of its reputation in the research world, most bottles feature hazard symbols for acute toxicity and environmental risk. Scientists count on this straightforward labeling to limit surprises when opening a vial.
Time in the lab teaches that many compounds go through lengthy and expensive purification processes, but antimycin's path reflects the patience of mid-century chemistry. Culture broths of Streptomyces bacteria undergo careful extraction and partitioning. Organic solvents coax the molecule from the broth, and repeated rounds of chromatography tidy things up. When prepared synthetically or semi-synthetically, each step demands tight temperature and pH control. Modern approaches with engineered bacteria promise higher yields, though old-school fermentation still gets the job done in most research settings.
Beyond its original form, scientists tinker with antimycin’s structure to tease out new biological properties or to try beating its toxicity. Chemical modifications target the lactone ring or the side chains, giving rise to derivatives that may interact differently with cellular pathways. It’s a molecular playground for medicinal chemists looking for more selective or less toxic mitochondrial inhibitors. A few research groups probe into these analogs for experimental drugs or molecular probes, hoping to turn a natural saboteur into a research ally.
People refer to antimycin A by several aliases—Fungicidin A, F55, and sometimes just "antimycin" in shorthand lab conversation. These alternate names reflect its varied history across antibiotic screens, fungicide tests, and aquatic toxicant trials. In chemical registries, antimycin A most often refers to a mixture of closely related components, like antimycin A1, A2, A3, and A4, which share the core features and differ only at the molecular outskirts. Such naming quirks remind anyone working with it to double-check what’s inside the bottle.
Lab routines drill the hazards of antimycin A into everyone who handles it. Its acute toxicity means no shortcuts with gloves, goggles, or chemical fume hoods. Any potential for skin or eye exposure is treated seriously. Waste disposal leans toward the cautious side, segregating antimycin-tainted solvents for incineration. In places with aquaculture nearby, local rules sometimes require reporting or permitting before purchase or disposal. Experience says respect for the molecule remains a must, even for short experiments. Routine makes safe handling second nature, yet every new set of hands in the lab gets another round of training before touching a vial.
Antimycin A’s original ticket got punched in fisheries management, where it knocked down invasive species or stunted pest fish populations. It ended up in selective fish eradication programs in lakes during the mid-1900s. As cell biology grew into a central science, its reputation grew among scientists probing energy production in eukaryotic cells. Now, it finds new use in cancer research, where researchers employ it to simulate or study mitochondrial dysfunction, model neurodegenerative disease, or screen for rescue compounds. Its agricultural and industrial careers shrank over time, as environmental concerns and regulatory restrictions clamped down. But inside research labs, its story keeps expanding as tools for targeting mitochondria only grow more important.
Every major tool in science gets a makeover as technology develops, and antimycin A isn’t stuck in the past. Synthetic biology offers routes to higher yields and cleaner mixtures, removing batch-to-batch headaches that plagued early researchers. Automated chemistry and high-throughput screening now allow hundreds of analogs to be tested in one run, looking for molecules that hit mitochondria but spare healthy cells. As researchers dig into mitochondrial disease, oxidative stress, and programmed cell death, antimycin remains a useful tool—even as newer molecules nudge their way into the spotlight. The push continues for modifications that soften its toxicity, making it just as useful in living systems as it has been in test tubes.
Conversations about antimycin A always circle back to poison. The poisonous reputation fits, considering its roots as a piscicide. Toxicity studies in fish and mammals show that even a small amount can shut down respiration and cause death. In cell cultures, it brings about apoptosis through oxidative stress and ATP depletion. This mechanism has benefits for dissecting bioenergetics yet brings obvious dangers in field applications or industrial uses. Researchers investigate structural changes that could retain its mechanistic insight without putting the environment at risk. Regulatory reviews grow stricter, and for good reason—once its effect on aquatic ecosystems became clear, the world learned to keep antimycin A use on a tight leash.
Antimycin A’s story isn’t finished. New directions open as our understanding of mitochondria and metabolic disease deepens. Drug developers look for safer versions as potential treatments for rare mitochondrial disorders, even while the original molecule stays locked up for most uses. Tools for cancer research demand precise inhibitors, and antimycin analogs remain high on the list. Environmental caution pushed it out of large-scale fisheries and agriculture, but in controlled settings its value for science only grows. Each discovery with antimycin lays the groundwork for broader advances against disease and deeper insight into what keeps cells alive or pushes them toward death.
Antimycin A shows up in some surprising places. Back in college, our lab spent days poking at it because it shuts down a chunk of cellular energy production. Scientists use this compound to block the mitochondrial electron transport chain. For those not buried in textbooks, that means the energy-making machinery in cells grinds to a halt under its influence. Researchers rely on antimycin A to tease apart complicated cell processes and test out how living things react when their energy is suddenly yanked away.
Fish biologists, though, see antimycin A as more than just lab equipment. The U.S. Fish and Wildlife Service long used this chemical to manage invasive fish species. Drop it in the water, and certain fish populations shrink fast. It disrupts how cells breathe, so fish can’t survive. People clearing out non-native carp from a lake lean on antimycin A’s fast-acting punch, counting on it to sweep out unwanted species while leaving the rest of the ecosystem mostly untouched.
Every useful chemical brings baggage. Antimycin A does its main job so well because it’s toxic to nearly every animal cell. It lingers in water, affecting more than just the target fish. During big fish-control projects, nearby biologists must carefully plan dosages so the chemical doesn’t drift downstream and hurt unintended species. A 2007 review by the U.S. Geological Survey tracked antimycin A’s movement through watersheds. Careless cleanup, it warned, can hit native invertebrates and amphibians, not just the invasive fish. Accidents here don’t make the evening news, but they’ve left their mark in fieldwork logs and conservation databases.
Inside the lab, antimycin A rarely threatens people, but it’s not harmless. Breathing in its dust, or getting it on skin, can cause problems for lab workers. Standard research protocols treat it like any hazardous material: safety glasses, gloves, and no eating nearby. These risks underline why antimycin A holds a niche spot, favored by those who fully understand what it does but never handled casually.
Fish and Wildlife agencies phased out many uses of antimycin A after the early 2000s, mainly because small mistakes can ripple through stream food webs. Today, alternative approaches — from targeted electrofishing to introducing natural predators — fill the gap. None of these methods matches antimycin A’s precision against certain pests, but they leave less toxic residue behind.
Research labs still rely on antimycin A to uncover the secrets of mitochondria, aging, and disease. There’s pressure to shift toward more sustainable or biodegradable options, but the simple, powerful action of antimycin A means it sticks around in biology toolkits. Safety training, tight regulations, and learning from field mishaps help limit fallout.
Growing up near streams where wildlife managers ran cleanup projects, I saw both sides of the debate. Fish rebounded after targeted treatments, but stories about vanished frogs and unintended die-offs sometimes surfaced years later. Tools like antimycin A solve narrow problems but pull consequences along for the ride.
Antimycin A remains part of the scientific landscape, prized for stopping cellular engines in their tracks. It played a big role in controlling invasive fish, but hidden costs and environmental risks have led to stricter oversight and a search for safer options. Anyone working with it, in the lab or outdoors, learns quickly just how much power this chemical carries — and how much responsibility tagging along with it requires.
Antimycin A isn’t just a chemical with a complicated name tossed around in laboratories. This compound’s knack for shutting down a key part of energy production in cells has turned it into a useful tool for researchers and medicine-makers alike. As a biology student years back, I remember how professors highlighted Antimycin A when they explained mitochondria—the so-called power plants of the cell. Watching how a single chemical could throw such a wrench into cellular machinery gave me new respect for both the complexity and fragility of life.
Mitochondria keep our cells powered up by slicing nutrients into molecules of ATP, which cells burn for energy. The chain of events inside mitochondria is called the electron transport chain. Antimycin A’s big moment comes at what’s known as Complex III. Rather than letting electrons zip smoothly to help charge up ATP, Antimycin A blocks the road by holding down a protein called cytochrome c reductase. With that single shot, electrons can no longer travel down the chain, and ATP production crashes to a near halt. That’s not just trivia—this sort of interruption can starve cells of energy, leading to cell injury or death.
It isn’t just textbook knowledge. Researchers use Antimycin A to better understand diseases tied to mitochondria—things like muscle disorders, heart failure, or some neurological issues. When you picture a failing heart struggling to beat or a brain cell going dark, the mechanics of Antimycin A’s blockade offer important clues about what might be going wrong in those conditions.
Fisheries and environmental scientists have also noticed Antimycin A. Since this compound messes with oxygen use in cells, it’s sometimes deployed to selectively control fish populations. Invasive species threaten native fish and the whole aquatic ecosystem—Antimycin A tips the balance when regular fishing tools can’t target the right populations. Nobody uses these chemicals lightly, though; dumping a metabolic disruptor into open water means researchers need clear data, safety plans, and an eye on long-term effects. EPA guidelines limit its use, given the potential impacts on local wildlife and water quality.
Antimycin A’s quirks made it handy for cancer researchers too. Tumor cells, with their wild hunger for energy, sometimes operate on faulty mitochondrial machinery. Exposing them to Antimycin A leaves these cells exposed, helping scientists test new ways to starve tumors without damaging healthy tissue. Work continues into how safe or possible it might be to translate such strategies into treatments, since a chemical that stops energy production isn’t exactly risk-free. The aim is finding more selective versions—compounds that hurt only the “bad” cells with broken machinery. So far, Antimycin A serves more as a blunt tool for discovery than as a direct treatment.
Sitting with a chemical like Antimycin A, you start to realize that power and danger often share the same chemistry. Its ability to derail something so fundamental as cellular respiration underscores how modern science keeps searching for stronger, smarter, more targeted molecules. For now, Antimycin A holds its place in labs and select environmental uses, always watched closely and never handled carelessly, as researchers keep looking for ways to harness the lessons it delivers.
Antimycin A stands out as a valuable compound in research and industry, especially for its use in studying cellular respiration. As someone who’s spent years handling sensitive reagents, I’ve seen what happens if storage guidelines get ignored. A powder like Antimycin A isn’t just expensive—it’s tricky. Small slip-ups during storage can waste time, money, and precious research.
Antimycin A keeps longest at -20°C. Most lab freezers hover around that mark, and for a good reason. Cold storage slows down degradation. People sometimes cut corners and keep it in a fridge for convenience. Doing so chips away at reliability. Over time, breakdown products creep in, introducing variables no researcher wants.
If someone keeps Antimycin A in a room-temperature drawer—even for a few days—the powder might not look any different, but purity drops away. Controlling temperature isn’t about playing it safe; it’s about protecting data and experiments from going off the rails.
Humidity can ruin Antimycin A faster than poor lighting or dusty containers. Tight seals are non-negotiable. Screw caps must sit snugly, and it pays to toss in some silica gel if the bottle’s in and out of the freezer. Moisture, even in small amounts, nudges the compound toward breakdown. In my years working with lab chemicals, untouched vials left near freezers (constantly exposed to humid air every time the door swings open) grew clumpy. That clumping marks the start of trouble.
Compounds that fuss over storage conditions often react to light, and Antimycin A fits this bill. Direct sunlight or strong lab lights fade potency. Amber vials cost more, but throwing Antimycin A into a clear container and leaving it on a shelf turns hard-earned research dollars to dust. If an amber or opaque bottle isn’t an option, wrapping vials in foil gets the job done.
Repeated freeze-thaw cycles chew away at stability. Instead of dipping into the same vial each day, portion out smaller aliquots. This cuts back on air exposure and prevents water condensation inside the vial. Less handling equals fewer mishaps. Over my career, aliquoting became second nature, cutting down spoiled batches by a huge margin.
Expired chemicals are a headache nobody needs. Use-by dates aren’t just bureaucracy. Antimycin A won’t suddenly stop working the day after, but you only notice the decline once an experiment fails and you’re left retracing your steps. Updated inventory logs, bold labels with dates, and clear user notes made a world of difference in labs I worked with.
Caring for Antimycin A isn’t just about babying a bottle of powder. It’s about respect for lab work, research funds, and the time of everyone in the group. After seeing too many projects go sideways because of shortcuts, it’s clear: proper storage always pays off, even if it takes a little extra effort up front.
Antimycin A shows up often in labs and research setups as a powerful tool in the study of mitochondria and cellular respiration. Its function as an inhibitor of the electron transport chain helps researchers break down complicated biological processes. Outside the lab, though, antimycin A appears in certain pest control and aquaculture applications. This brings some questions. Is the chemical toxic? Are its hazards manageable or worth serious concern?
Small doses of antimycin A disrupt the energy production in cells, especially inside mitochondria. This disruption isn’t just something scientists see under a microscope. In fish, antimycin A exposure causes rapid death by choking off the energy supply cells need to survive. Because of this, fisheries managers sometimes use it in targeted ways to remove unwanted fish species from a body of water. I’ve seen cases where biologists empty a pond for conservation using antimycin A; the speed of action is striking. Aquatic organisms are the most at risk, with the chemical quickly knocking down entire populations when misapplied.
Lab workers and pesticide applicators should recognize the direct danger. Direct skin or eye contact causes irritation, and accidental inhalation or ingestion triggers serious symptoms. The U.S. Environmental Protection Agency classifies antimycin A as toxic when swallowed or inhaled — it's not something to use without full precautions. Protective clothing, respirators, and glove use form standard practice for anyone handling this compound.
Any accidental spill into groundwater or open bodies of water risks harm to almost every form of aquatic life. While antimycin A breaks down over time, the immediate effects wipe out more organisms than intended, upsetting already fragile habitats. Regulations in place restrict its use to targeted operations under strict supervision. Tracking concentration and water movement after use determines if accidental spread threatens more waterways or food webs downstream.
Decades of research document antimycin A’s acute aquatic toxicity. A study published by the U.S. Fish and Wildlife Service reports that concentrations as low as 10 parts per billion kill trout. That finding alone calls for thoughtful control. On top of this, the World Health Organization labels antimycin A among toxic pesticides, underlining the health risk not only for handlers but anyone exposed through runoff or contaminated water. Strict labeling, training, and record keeping form the basis of most regulatory frameworks.
Oversight comes down to careful storage, proper labeling, and clear procedures for use and disposal. The storage area must keep the chemical away from food products and incompatible chemicals. Quick action plans for accidental exposure or spill prepare users to respond if things go wrong. Everyone who handles antimycin A benefits from specific training about what symptoms to watch for, what steps provide first aid, and what emergency contacts must know. Alternatives with lower ecological impact do exist, though sometimes they don't match the effectiveness of antimycin A. Investing in such options and ongoing research can shrink the environmental footprint, keeping ecosystems safer for years to come.
Antimycin A carries the formula C₈₈H₁₀₀N₂O₁₈ and rings in with a molecular weight of 548.7 g/mol. This molecule, originally discovered in the soil, plays an outsized role in medicine and science. Anyone who has worked in a biology lab might remember it as a compound that brings many experiments to a quick stop. Inhibiting the electron transport chain, especially at complex III, puts the brakes on cellular respiration fast. I’ve seen cells go from lively to listless after a dose of antimycin; there’s no mistaking the results.
On paper, the string of carbons, hydrogens, nitrogens, and oxygens woven into C₂₈H₄₀N₂O₉ suggests complexity—and real power. In practice, small changes in the side groups have a huge impact on antimycin’s activity. The structure enables it to wedge into mitochondrial membranes. Years ago, researchers tracked down the signature that distinguishes antimycin from its close molecular cousins—there’s a nine-membered dilactone ring fused with aromatic groups. That core design lays the path for its strong binding action.
For researchers and chemists, knowing the molecular weight is more than trivia. Accurate weights anchor safe dosing, proper storage, and create the calibration points for purity analysis and bioactivity assays. When weighing out crystalline antimycin, a high-precision scale is standard, because 548.7 grams per mole doesn’t leave much room for error in pharmaceutical or toxicity studies.
Work in agriculture and aquaculture leans on antimycin too. Fishery managers might recognize it as an old weapon against overpopulated fish species. Because it messes with oxygen consumption at the cellular level, target species succumb while others survive. Still, field application walks a fine line; a fraction of a gram too much can wreak havoc on an ecosystem. Regulators in the United States set tight controls for this reason.
Research laboratories use its unique molecular properties to map out the mechanics of respiration. I remember troubleshooting an experiment on yeast mitochondria, grappling with confusing results until we realized the supplier shipped antimycin with impurities. Reliable molecular formula information helped us trace the problem—impure batches often display the wrong molar mass or formula, so quality control loops back to chemistry basics.
Production at scale relies on skilled fermentation and extraction techniques, keeping that C₂₈H₄₀N₂O₉ core structure intact through every step. Synthetic chemists still strive to engineer analogs with custom side chains hoping to fine-tune selectivity and reduce toxicity. Open-access databases and standardization drive progress, helping labs rely on accurate molecular weight and formula references for Antimycin A worldwide.
Balancing its benefits and risks, the right formula keeps both science and safety on track. Trusted sources, smart handling, and transparent labeling are nonnegotiable. The formula C₂₈H₄₀N₂O₉ and a reliable mass of 548.7 g/mol serve as more than references—they signal the importance of rigor at every stage, from drug bench to watershed management.
| Names | |
| Preferred IUPAC name | (2R,3S,4R,6S,7S,8R)-3-[(2R,3S,4R,6S,7S,8R)-8-Butyl-2-[(3-formamido-2-hydroxybenzoyl)amino]-4,6,7-trihydroxy-3-methylnonanoyl]amino-8-ethyl-2-hydroxy-4,6,7-trimethyloctanoic acid |
| Other names |
Antimycin Antibiotic SF 773-R1 Baumycin BL 558 EINECS 215-088-7 Feniculin U-1402 Antimycin A1 Antimycin A3 |
| Pronunciation | /ˌæn.tiˈmaɪ.sɪn eɪ/ |
| Identifiers | |
| CAS Number | 1397-94-0 |
| Beilstein Reference | 1468556 |
| ChEBI | CHEBI:2766 |
| ChEMBL | CHEMBL566494 |
| ChemSpider | 54667 |
| DrugBank | DB04430 |
| ECHA InfoCard | ECHA InfoCard: 100.210.184 |
| EC Number | 1.19.2.1 |
| Gmelin Reference | 85348 |
| KEGG | C1368 |
| MeSH | D000898 |
| PubChem CID | 162126 |
| RTECS number | AG2975000 |
| UNII | F32G2R1W3B |
| UN number | UN2811 |
| Properties | |
| Chemical formula | C28H40N2O9 |
| Molar mass | 548.6 g/mol |
| Appearance | White crystalline powder |
| Odor | Odorless |
| Density | 0.98 g/cm³ |
| Solubility in water | Slightly soluble |
| log P | 3.68 |
| Vapor pressure | 8.97E-17 mmHg |
| Acidity (pKa) | 5.25 |
| Basicity (pKb) | 10.5 |
| Refractive index (nD) | 1.625 |
| Viscosity | Viscous oil |
| Dipole moment | 4.48 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 354.7 J·mol⁻¹·K⁻¹ |
| Pharmacology | |
| ATC code | P01PX02 |
| Hazards | |
| Main hazards | Toxic if swallowed, harmful if inhaled, may cause respiratory irritation, toxic to aquatic life. |
| GHS labelling | GHS02, GHS06, GHS08 |
| Pictograms | GHS06, GHS08 |
| Signal word | Danger |
| Hazard statements | H302 + H332: Harmful if swallowed or if inhaled. H400: Very toxic to aquatic life. |
| Precautionary statements | P261, P273, P280, P301+P312, P302+P352, P304+P340, P308+P311 |
| NFPA 704 (fire diamond) | 2-3-0 |
| Lethal dose or concentration | LD₅₀ (rat, oral): 1.0 mg/kg |
| LD50 (median dose) | LD50 (median dose): 1 mg/kg (intravenous, mouse) |
| NIOSH | MF8125000 |
| PEL (Permissible) | 100 µg/m³ |
| REL (Recommended) | 0.1-1 μg/mL |
| IDLH (Immediate danger) | Not established |
