storage stability 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.
Updated 2026-04-20. Numbers and descriptions here follow the published literature rather than marketing material.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also marketed informally as Stenabolic |
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ |
| Molecular formula | C24H30ClN3O4S | Approximate molecular weight 492 g/mol |
| CAS Registry Number | 1379686-30-2 | Identifier for the parent compound |
| Regulatory status | Not approved for human use | Prohibited in sport by WADA |
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.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
Profilin is an actin-binding protein involved in the dynamic turnover and reconstruction of the actin cytoskeleton. It is found in most eukaryotic organisms. Profilin is important for spatially and temporally controlled growth of actin microfilaments, which is an essential process in cellular locomotion and cell shape changes. This restructuring of the actin cytoskeleton is essential for processes such as organ development, wound healing, and the hunting down of infectious intruders by cells of the immune system. Profilin also binds sequences rich in the amino acid proline in diverse proteins. While most profilin in the cell is bound to actin, profilins have over 50 different binding partners. Many of those are related to actin regulation, but profilin also seems to be involved in activities in the nucleus such as mRNA splicing. Profilin is the major allergen (via IgE) present in birch, grass, and other pollen.
Minoxidil causes a redistribution of cellular iron through its apparent capacity to bind this metal ion. By binding iron in a Fenton-reactive form, intracellular hydroxyl radical production would ensue, but hydroxyl would be immediately trapped and scavenged by the minoxidil to generate a nitroxyl radical. It is presumed that this nitroxyl radical will be capable of reduction by glutathione to reform minoxidil. Such a process would cycle until the minoxidil is otherwise metabolized and would result in rapid glutathione depletion with glutathione disulphide formation and therefore with concomitant consumption of NADPH/NADH and other reducing equivalents. Minoxidil inhibited PHD by interfering with the normal function of ascorbate, a cofactor of the enzyme, leading to a stabilization of HIF-1α protein and a subsequent activation of HIF-1. In an in vivo angiogenesis assay, millimolar minoxidil increased blood vessel formation in a VEGF-dependent manner. Minoxidil inhibition of PHD occurs via interrupting ascorbate binding to iron. The structural feature of positioning amines adjacent to nitric oxide may confer the ability of millimolar minoxidil to chelate iron, thereby inhibiting PHD. Minoxidil is capable of tetrahydrobiopterin inhibition as a cofactor for nitric oxide synthase. Minoxidil stimulates prostaglandin E2 production by activating COX-1 and prostaglandin endoperoxide synthase-1 but inhibits prostacyclin production.
=== Estonian === Sünnipäevanädalalõpupeopärastlõunaväsimatus meaning "afternoon untiredness of a weekend birthday party" which is 43 letters. 31 lettered word of uusaastaöövastuvõtuhommikuidüll [uːsɑːstaøːvastuvɤtuhomikuidyl] meaning "morning idyll after the new year". There is also the 25 letter long word of põllumajandusministeerium which is "Ministry of Agriculture". The word kuulilennuteetunneliluuk meaning "the hatch a bullet flies out of when exiting a tunnel" is 24 letters long and a palindrome. It could be one of the longest palindromes.
Using any part of a living organism Protein purification involves the isolation of a specific protein of interest from a complex mixture of proteins, often obtained from homogenized cells or tissues. Using parts derived from multicellular organisms (cell culture, tissue culture, and more) In vitro fertilization is used to allow spermatozoa to fertilize eggs in a culture dish before implanting the resulting embryo or embryos into the uterus of the prospective mother. In vitro diagnostics refers to a wide range of medical and veterinary laboratory tests that are used to diagnose diseases and monitor the clinical status of patients using samples of blood, cells, or other tissues obtained from a patient. In vitro pharmacological testing has been used to characterize specific adsorption, distribution, metabolism, and excretion processes of drugs or general chemicals inside a living organism; for example, Caco-2 cell experiments can be performed to estimate the absorption of compounds through the lining of the gastrointestinal tract; The partitioning of the compounds between organs can be determined to study distribution mechanisms; Suspension or plated cultures of primary hepatocytes or hepatocyte-like cell lines (Hep G2, HepaRG) can be used to study and quantify metabolism of chemicals. These ADME process parameters can then be integrated into so called "physiologically based pharmacokinetic models" or PBPK. Cellular models of neurodegenerative diseases allow different ways to probe the health of the mitochondria in the cell. Using cellular or subcellular extracts (e.g.
Sources: en.wikipedia.org
== Structural Chemistry == Caricain is synthesized as a preproenzyme. There is evidence at the mRNA level for polymorphism, two very similar clones being isolated, one of which contained a C-terminal extension. The primary structure of the mature form of the enzyme has been determined, and is as predicted from one of the cDNA sequences. The protein is 216 amino acids in length, and is 68% identical in sequence to papain, 65% to chymopapain and 81% to glycyl endopeptidase. The three disulfide bonds are conserved between all the papaya proteinases, and there is no evidence for glycosylation. Caricain is an extremely basic protein, with pI estimated to be 11.7. The A280,1% is reported to be 18.3, giving a molar extinction coefficient of 4.193 104 M21 cm21. As with some other plant cysteine endopeptidases, caricain exhibits charge heterogeneity. This may be partly due to variation in the oxidization state of the active-site sulfur, as is the case with homologous enzymes from pineapple stem, although genetic polymorphism may also contribute. The crystal structure of caricain has been solved to a resolution of 1.8 A ̊, and demonstrates main-chain conformation very similar to that of papain. Caricain has four amino acid residues (Ser169-Lys172) not present in papain, but it is papain that is exceptional at this point in the sequence, showing a deletion not seen in other members of the family. The architecture of the active site of caricain is very similar to that of papain.
Distinguished as a biochemist. Was the first to show the possibility of using counter-current liquid-liquid extraction in the separation of N-acetylamino acids. In collaboration with A.J.P. Martin this led to the development of partition chromatography, which they have applied with conspicuous success in problems related to the composition and structure of proteins, particularly wool keratin. Synge's recent work on the composition and structure of gramicidins is outstanding and illustrates vividly the great advances in technique for which he and Martin are responsible. In 1963 he was elected a Fellow of the Royal Society of Edinburgh. His proposers were Magnus Pyke, Andrew Phillipson, Sir David Cuthbertson and John Andrew Crichton. He was for several years the treasurer of the Chemical Information Group of the Royal Society of Chemistry, and was an honorary Professor in Biological Sciences at the University of East Anglia from 1968 to 1984. He was awarded an honorary Doctor of Science (ScD) from the University of East Anglia in 1977, and an honorary doctorate from the Faculty of Mathematics and Science at Uppsala University, Sweden in 1980.
=== Research === In 2013, Rocky De Nys and his team at JCU along with CSIRO performed in vitro tests on 30 tropical macroalgae species using an artificial cow stomach. Dried seaweed biomass was mixed in with low quality roughage and combined with rumen fluid. Temperature and pH were then maintained to accurately simulate the fermentation process that occurs within ruminant stomachs during digestion. The total volume and concentrations of produced gases were measured for each sample at 12-hour intervals over a 72-hour period. All seaweed species were shown to reduce methane emissions in some capacity with a 50% average reduction. However this required dosages as much as 20% of dietary intake. This was problematic as the high concentrations required would most likely cause digestion issues for livestock by reducing the volume of volatile fatty acids. Asparagopsis taxiformis proved the most effective with a measured methane reduction of 98.9%. Dictyota was the second most effective seaweed with a measured methane reduction of 92%. The results of this experiment provided sufficient evidence for CSIRO to select Asparagopsis as the main ingredient in livestock feed. In 2014, a patent on a method for reducing total gas production and/or methane production in ruminants (such as sheep and cattle) was registered by CSIRO, MLA and JCU. De Nys and Kinley expanded upon the experiment in 2015 with the goal of finding an ideal dosage of Asparagopsis. The aim was to maximise methane reduction without compromising enteric health.
=== Applications for ecosystem process analysis === Isotopic tracers are used to examine processes in natural systems, especially terrestrial and aquatic environments. In soil science 15N tracers are used extensively to study nitrogen cycling, whereas 13C and 14C, stable and radioisotopes of carbon respectively, are used for studying turnover of organic compounds and fixation of CO2 by autotrophs. For example, Marsh et al. (2005) used dual labeled (15N- and 14C) urea to demonstrate utilization of the compound by ammonia oxidizers as both an energy source (ammonia oxidation) and carbon source (chemoautotrophic carbon fixation). Deuterated water is also used for tracing the fate and ages of water in a tree or in an ecosystem.
Two conserved cysteines coordinate one Fe ion while the other Fe ion is coordinated by two conserved histidines. The 2Fe-2S cluster is bound in the highly conserved C-terminal region of the Rieske subunit.
Sources: en.wikipedia.org
== Prosecution == McTavish was tried in 1974 for the murder of an 80-year-old patient, Elizabeth Lyon and assaulting three other patients by giving them illegal injections. One victim was found after tests to have an inexplicable quantity of pethidine in their system, while the murder victim had been injected with soluble insulin. Colleagues of McTavish told the court how they had witnessed her inject a patient with an entirely unnecessary dose of phenobarbitone and then make no record of the injection, and that she had said at the time, "Doctor likes them to go quietly." Multiple doctors testified that McTavish often gave patients injections without recording these events in the patients' case notes. Despite the blood test evidence, McTavish claimed during the 15-day trial that she had only injected the patient with a placebo of sterile water. However, McTavish had admitted in police interviews that she had administered insulin to patients without authorisation. McTavish was jailed for life in October 1974. An appeal in February 1975 was successful. Three appeals court judges said that while there was ample evidence to support the conviction, the McTavish's legal team's successful argument—that the judge, Lord Robertson, had inadvertently misled the jury—would prevail. The appeals judges said Lord Robertson had failed to highlight the fact that McTavish denied admitting to the police that she had committed a mercy killing, an omission that "a few words could have cured." Apart from the case prosecuted, another 23 deaths were deemed suspicious by investigators.
=== Establishment === The British South Africa Police's Special Branch began pseudo operations to collect intelligence in 1966. The Rhodesian Army took part in a joint trial using these tactics with the British South Africa Police and Special Branch that year, but it was not successful for at that stage the black population was largely indifferent to the insurgents and so not able to provide intelligence on them. The ZANLA began to gain control over north-eastern Rhodesia from 1971, and considerably strengthened its influence over the population in the region over the next year. This led to the networks of informers who had provided information to the Rhodesian Government ceasing to do so, which made it difficult for the security forces to locate and counter the insurgents. In response, Special Branch began to establish pseudo teams in January 1973. The Rhodesian Army also formed two such teams in February; these comprised members of C Squadron 22 (Rhodesian) SAS, black soldiers from the Rhodesian African Rifles and former insurgents. These teams enjoyed success, leading to a decision to expand pseudo operations. Major Ronald Francis Reid-Daly was selected to command the unit that became the Selous Scouts in November 1973. He was personally selected for this role by Lieutenant General Peter Walls, the head of the Rhodesian Army. An initial group of 25 personnel were selected and trained at Makuti near Lake Kariba. The first troop completed training and began operations in January 1974, followed by two other troops in February and March that year.
=== Photoconductors === Amorphous selenium (α-Se) thin films have found application as photoconductors in flat-panel X-ray detectors. These detectors use amorphous selenium to capture and convert incident X-ray photons directly into electric charge. Selenium has been chosen for this application among other semiconductors owing to a combination of its favorable technological and physical properties:
Many types of MNPs have been developed to penetrate tissues other than skin, such as internal tissues of the mouth and digestive tract. These promote faster and more direct delivery of the molecule to the targeted area.
== L == LALLS – Low-angle laser light scattering LC-MS – Liquid chromatography-mass spectrometry LEED – Low-energy electron diffraction LEEM – Low-energy electron microscopy LEIS – Low-energy ion scattering LIBS – Laser induced breakdown spectroscopy LOES – Laser optical emission spectroscopy LS – Light (Raman) scattering
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that binds and modulates the nuclear receptors REV-ERBα and REV-ERBβ. It is used in laboratory studies of circadian biology and metabolism, not as an approved medicine. It is also known by the informal name Stenabolic.
No. SR9009 has not been approved as a therapeutic drug in the United States, European Union, or other major markets. Human safety and efficacy data are very limited. Its presence in consumer products does not imply regulatory approval.
The World Anti-Doping Agency lists SR9009 as a prohibited substance because it can alter gene expression and metabolic pathways relevant to performance. The ban applies at all times, not only during competition. Detection relies on laboratory methods such as mass spectrometry.
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.