research chemical comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-06-23. Where a claim depends on a specific study, the study is described rather than over-claimed.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small-molecule REV-ERB agonist | Not a hormone or natural product |
| Primary targets | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian and metabolic regulation |
| Appearance | White to off-white solid | Typical for purified research samples |
| Solubility | Soluble in DMSO and ethanol; low water solubility | Laboratory solubility depends on solvent and purity |
| Common synonyms | SR9009; Stenabolic | Stenabolic is a colloquial name, not a formal chemical name |
Stability depends on physical form, temperature, light exposure, and solvent. Solid SR9009 is generally stored cold and dry, with protection from light to limit degradation. Dimethyl sulfoxide stocks are common for laboratory work, but repeated freeze-thaw cycles can reduce compound integrity. Aqueous solutions may be less stable than organic stocks, and the ethyl ester in the structure can be susceptible to hydrolysis under certain conditions. Researchers typically validate storage conditions and recheck purity before quantitative experiments, especially when using archived material.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
== External links == "Prolactin-Releasing Peptide Receptor". IUPHAR Database of Receptors and Ion Channels. International Union of Basic and Clinical Pharmacology. Archived from the original on 2016-03-03. Retrieved 2008-12-09. PRLHR+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH) This article incorporates text from the United States National Library of Medicine, which is in the public domain.
== Legal status == Coca tea is legal in Colombia, Peru, Bolivia, Argentina, Uruguay and Ecuador. Its use is being discouraged in part by the Single Convention on Narcotic Drugs. Coca tea is illegal in the United States unless it is decocainized.
== Regulation == H2S decreases transcription of cystathionase at concentrations between 10 and 80 μM. However, transcription is increased by concentrations near 120 μM, and inhibited completely at concentrations in excess of 160 μM.
There are currently five known types of cells in an islet: beta cells, which make insulin and C-peptide; alpha cells, which make glucagon; delta cells, which make somatostatin; F cells which make pancreatic polypeptide, and D1 cells, about which little is known. The names of the cell types vary with location; in the UK they have slightly different names than in the US.
AnIML Core AnIML Technique Definitions Additionally, AnIML Technique Definition Documents apply constraints to the AnIML Core and are specified by the AnIML Technique Definitions. The AnIML Core consists of a set of rules defining the structure of the XML document, providing a universal container for arbitrary analytical data. AnIML Technique Definitions describe how to use the AnIML Core to record experiments of a particular scientific discipline. There is a big similarity between the mechanisms of AnIML and the AVI format. The AnIML Core defines the data container, whereas the AnIML Technique Definitions act similar to the AVI codec. It defines how the data needs to be structured and labeled. Technique Definitions are XML documents, specified by the Technique Schema. official website AnIML on GitHub
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Technetium also has numerous nuclear isomers, which are isotopes with one or more excited nucleons. Technetium-97m (97mTc; "m" stands for metastable) is the most stable, with a half-life of 91.1 days and excitation energy 0.097 MeV, followed by technetium-95m (62.0 days, 0.039 MeV), and technetium-99m (6.01 hours, 0.143 MeV). Technetium-99 (99Tc) is a major product of the fission of uranium-235 (235U), making it the most common and most readily available isotope of technetium, and the only one detected in nature. One gram of technetium-99 produces 6.2 × 108 disintegrations per second (in other words, the specific activity of 99Tc is 0.62 GBq/g).
Mental disorders are diagnosed in accordance with diagnostic manuals such as the International Classification of Diseases (ICD), edited by the World Health Organization (WHO), and the Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association (APA). The fifth edition of the DSM (DSM-5) was published in May 2013. However, its release coincided with a statement by then-NIMH (National Institute of Mental Health) director Thomas Insel noting that the manual lacks validity compared to other medical specialties due to the absence of objective laboratory measures (biomarkers) for diagnosis. Treatment may include psychotropics (psychiatric medicines), psychotherapy, substance-abuse treatment, and other modalities such as interventional approaches, assertive community treatment, community reinforcement, and supported employment. Treatment may be delivered on an inpatient or outpatient basis, depending on the severity of functional impairment or risk to the individual or community. Research within psychiatry is conducted by psychiatrists on an interdisciplinary basis with other professionals, including clinical psychologists, epidemiologists, nurses, social workers, and occupational therapists. Psychiatry has been controversial since its inception, facing criticism both internally and externally over its medicalization of mental distress, reliance on pharmaceuticals, use of coercion, influence from the pharmaceutical industry, and its historical role in social control and contentious treatments.
The digital elevation model (DEM) is a raster-based digital dataset of the topography (hypsometry and/or bathymetry) of all or part of the Earth (or a telluric planet). The pixels of the dataset are each assigned an elevation value, and a header portion of the dataset defines the area of coverage, the units each pixel covers, and the units of elevation (and the zero-point). DEMs may be derived from existing paper maps and survey data, or they may be generated from new satellite or other remotely sensed radar or sonar data.
=== ConSurf === Ben-Tal has led the development of ConSurf, a computational method and web server that uses evolutionary information to identify potentially functionally important regions in proteins. The methodology maps evolutionary conservation scores onto three-dimensional molecular structures, allowing conserved regions of a protein to be visualized on its surface. The original ConSurf work was published in Bioinformatics in 2003 by a team that included Ben-Tal, Fabian Glaser, Tal Pupko, Inbal Paz, Rachel E. Bell, Dalit Bechor-Shental, and Eric Martz. The ConSurf project has subsequently been expanded through successive versions and databases. A 2016 paper described an updated methodology for estimating and visualizing evolutionary conservation in macromolecules, while later work produced ConSurf-DB, a repository containing precomputed evolutionary conservation profiles for proteins with known structures. Ben-Tal has continued to contribute to the development of ConSurf. A 2023 paper described a revised version of the system for using evolutionary information to analyze macromolecules.
Sources: en.wikipedia.org
adenylyl sulfate + 2 glutathione The 3 substrates of this enzyme are adenosine monophosphate, sulfite, and glutathione disulfide, whereas its two products are adenylyl sulfate and glutathione. This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donors with a disulfide as acceptor. The systematic name of this enzyme class is AMP,sulfite:glutathione-disulfide oxidoreductase (adenosine-5'-phosphosulfate-forming). Other names in common use include 5'-adenylylsulfate reductase (also used for, internal_xref(ec_num(1,8,99,2))), AMP,sulfite:oxidized-glutathione oxidoreductase, (adenosine-5'-phosphosulfate-forming), and plant-type 5'-adenylylsulfate reductase. In plants, APS is reduced by the plastidic enzyme APS reductase (APR; EC 1.8.4.9) in the presence of physiological concentrations of reduced glutathione (GSH), which acts as an electron donor.
A polyproline helix is a type of protein secondary structure which occurs in proteins comprising repeating proline residues. A left-handed polyproline II helix (PPII, poly-Pro II, κ-helix) is formed when sequential residues all adopt (φ,ψ) backbone dihedral angles of roughly (-75°, 150°) and have trans isomers of their peptide bonds. This PPII conformation is also common in proteins and polypeptides with other amino acids apart from proline. Similarly, a more compact right-handed polyproline I helix (PPI, poly-Pro I) is formed when sequential residues all adopt (φ,ψ) backbone dihedral angles of roughly (-75°, 160°) and have cis isomers of their peptide bonds. Of the twenty common naturally occurring amino acids, only proline is likely to adopt the cis isomer of the peptide bond, specifically the X-Pro peptide bond; steric and electronic factors heavily favor the trans isomer in most other peptide bonds. However, peptide bonds that replace proline with another N-substituted amino acid (such as sarcosine) are also likely to adopt the cis isomer.
In the same month, Sanders gave an interview to Mamdani in which they discussed Sanders's political beginnings and his achievements as a mayor and senator. On September 15, 2025, Sanders said that Israel is committing genocide in Gaza, becoming the first US senator to make such comment. In early February 2026, he criticized the U.S. government's proposed military aid to Israel. In a post on social media, he wrote that the U.S. was planning to send approximately $7 billion in weapons to Israel. Sanders argued that the U.S. should prioritize domestic needs, such as healthcare for all Americans, rather than provide military assistance to Israel. In April 2026, he proposed a resolution to block certain military aid to Israel, which failed. After Trump's speech at the United Nations on September 22, 2026, Sanders said that Trump's threat to "annihilate" Iran was a "war crime" and wrote: "Let's be clear: Trump's war in Iran is illegal and unconstitutional. Congress must end it NOW."
Sources: en.wikipedia.org
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.
It binds REV-ERBα and REV-ERBβ and changes transcription of metabolic genes. This can affect circadian rhythm, lipid use, and mitochondrial function. The full downstream effects are still under study.
No. Some rodent studies show increased endurance, but controlled human trials are lacking. Claims about human performance are not established by published evidence.
It is a synthetic compound that acts as an agonist at REV-ERBα and REV-ERBβ. It is used mainly as a research chemical to study circadian and metabolic pathways. It is not approved for human therapeutic use.