Everything below concerns LC-MS/MS. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-02-26. Where a claim depends on a specific study, the study is described rather than over-claimed.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C20H24ClN3O4S | Derived from published structure. |
| Molecular weight | 437.94 g/mol | Calculated value. |
| Appearance | White to off-white solid | Typical for purified research samples. |
| Solubility | DMSO, ethanol; low in water | Class: poorly water-soluble. |
| Typical storage | -20 °C, desiccated, protected from light | Limits degradation. |
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
Tánaiste Micheál Martin announces Irish government plans to "initiate an inter-State case against the United Kingdom under the European Convention on Human Rights" over provisions in the Northern Ireland Troubles (Legacy and Reconciliation) Act 2023 which offers immunity from prosecution for certain Troubles-era related offences. Junior doctors in England begin another three-day strike over their long-running pay dispute. A number of ballet dancers are reported to have come forward to make claims about incidents of "body shaming" at UK ballet schools following a BBC investigation into the subject earlier in the year. COVID-19 in the UK: JN.1 is reported as a new variant of interest, following a recent, rapid rise in COVID-19 cases. A teenage boy and girl who shared an obsession with violence and torture are convicted of the murder of Brianna Ghey. Lawrence Bierton is sentenced to a whole life order for the murder of his neighbour, 73-year-old Pauline Quinn, who he battered to death with a coffee table while out on parole following his conviction for two previous murders in 1996. The Scottish Government confirms it will abandon its legal challenge against the UK government's veto of the Gender Recognition Reform (Scotland) Bill. Eight-year-old girl, Bodhana Sivanandan from Harrow, London is crowned best female player at the European blitz chess championships in Zagreb, Croatia. The three men convicted of attempted murder for shooting two children on 14 December are jailed for 23 years.
=== Protein detection with antibodies (immunoassays) === Antibodies to particular proteins, or their modified forms, have been used in biochemistry and cell biology studies. These are among the most common tools used by molecular biologists today. There are several specific techniques and protocols that use antibodies for protein detection. The enzyme-linked immunosorbent assay (ELISA) has been used for decades to detect and quantitatively measure proteins in samples. The western blot may be used for detection and quantification of individual proteins, where in an initial step, a complex protein mixture is separated using SDS-PAGE and then the protein of interest is identified using an antibody. Modified proteins may be studied by developing an antibody specific to that modification. For example, some antibodies only recognize certain proteins when they are tyrosine-phosphorylated, they are known as phospho-specific antibodies. Also, there are antibodies specific to other modifications. These may be used to determine the set of proteins that have undergone the modification of interest. Immunoassays can also be carried out using recombinantly generated immunoglobulin derivatives or synthetically designed protein scaffolds that are selected for high antigen specificity. Such binders include single domain antibody fragments (Nanobodies), designed ankyrin repeat proteins (DARPins) and aptamers. Disease detection at the molecular level is driving the emerging revolution of early diagnosis and treatment.
===== PurT GAR transformylase ===== PurT GAR transformylase requires formate as the formyl donor and ATP for catalysis. It has been estimated that PurT GAR transformylase carries out 14-50% of GAR formylations in E. coli. The enzyme is a member of the ATP-grasp superfamily of proteins.
Sources: en.wikipedia.org
=== Extraction methods === Prior to analysis, YTXs must be isolated from the sample medium whether this is the digestive gland of a shellfish, a water sample, or a growth-culture medium. This can be achieved by several methods:
An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange, that is also known as an ionex. It is an insoluble matrix (or support structure) normally in the form of small (0.25–1.43 mm radius) microbeads, usually white or yellowish, fabricated from an organic polymer substrate. The beads are typically porous (with a specific size distribution that will affect its properties), providing a large surface area on and inside them where the trapping of ions occurs along with the accompanying release of other ions, and thus the process is called ion exchange. There are multiple types of ion-exchange resin, that differ in composition if the target is an anion or a cation and are created based on the task they are required for. Most commercial resins are made of polystyrene sulfonate which is followed by polyacrylate.
condosity A comparative measurement of the electrical conductivity of a solution defined as the molar concentration of a sodium chloride (NaCl) solution that has the same specific electrical conductance as the solution under test. It is typically expressed in units of moles per litre (or per some other unit of volume).
Erratic dimming and strong infrared emission are attributed to hot debris produced by the impact passing in front of the star. 12 March – An international team reports the first direct measurements of the nanomechanical properties of lithium dendrites, microscopic needle-like structures that can form inside lithium batteries and cause them to short circuit or catch fire. The study finds that dendrites are strengthened by a solid electrolyte interphase layer, making them brittle and capable of penetrating battery separators, providing new insight into battery degradation and safety risks. 17 March – Physicists at CERN's LHCb experiment report the discovery of the doubly charmed baryon Ξcc⁺. The particle, containing two charm quarks and one down quark, is detected with high statistical significance and resolves a long-standing discrepancy from earlier experimental results. 18 March – Charles H. Bennett and Gilles Brassard are awarded the 2025 Turing Award for their work in quantum information science. 20 March – Scientists from Great Ormond Street Hospital and University College London report the creation of the first lab‑grown oesophagus, and show it can safely replace a full section of the organ and restore normal function, including swallowing, in a growing animal without the need for immunosuppression. 24 March Antimatter particles are transported by road for the first time, to assess their stability during transit. An estimated 100 to 1,000 antiprotons are carried in a Penning trap across a distance of five kilometres in Switzerland.
Sources: en.wikipedia.org
== Operations == The BMC co-ordinates the production of beef from a national herd grazing on predominantly communal ranch lands which cover a large portion of the country. The population of the cattle suffered a notable decline between the 1980s and the early 2000s, with numbers decreasing from roughly three million to about 1,700,000. The company is closely monitored by the Botswana Veterinary Services for quality control. All stages of its production are certified to the ISO 9002 quality system. Chilled vacuum-packed beef cuts have a shelf-life of six months provided that the cold chain is maintained at a constant, specified minimum temperature. BMC also produces frozen boneless beef for manufacturing purposes with a two-year shelf-life as well as corned beef and other canned beef products for export. A 2005 report cited the company's European quota of frozen beef as 19,000 tonnes per year.
== Water and wastewater treatment == Microbubbles have been investigated as an aeration technology for water and wastewater treatment, where their long residence time, high specific surface area, and capacity to generate reactive oxygen species can improve gas-transfer efficiency and contaminant removal compared with conventional diffused aeration. Reviews of microbubble and nanobubble aeration have reported improvements in dissolved oxygen levels and biological oxygen demand removal in activated sludge processes when these technologies are applied in place of conventional aeration.
==== MMP ==== Another major contributor to angiogenesis is matrix metalloproteinase (MMP). MMPs help degrade the proteins that keep the vessel walls solid. This proteolysis allows the endothelial cells to escape into the interstitial matrix as seen in sprouting angiogenesis. Inhibition of MMPs prevents the formation of new capillaries. These enzymes are highly regulated during the vessel formation process because destruction of the extracellular matrix would decrease the integrity of the microvasculature.
Sources: en.wikipedia.org
SR9009 is a synthetic REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.
No. SR9009 targets the nuclear receptors REV-ERBα and REV-ERBβ, not the androgen receptor. This mechanism differs from selective androgen receptor modulators and from exercise mimetics that act on PPARδ.
Published evidence is mainly preclinical, using cell cultures and animal models. Controlled human trials are not well documented in the public literature. Claims about human performance or health effects therefore remain unsupported by robust clinical data.
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.