A practical reference on hGH fragment: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-06-16 and is reviewed periodically as new material appears.
The peptide is frequently described as a growth hormone fragment, although it is chemically distinct from full-length hGH. AOD-9604 contains 16 amino acids and includes two cysteine residues that can form an intramolecular disulfide bond. In solution, this structural feature can influence folding, aggregation, and stability. Published descriptions sometimes call it hGH 176-191 or AOD9604, with spacing and capitalization varying. Such naming differences can complicate literature searches, database entries, and product verification.
Researchers have studied the fragment in cell and animal models to understand its metabolic actions. Some experiments report effects on fat breakdown and fat storage pathways, but the underlying mechanism remains incompletely defined. AOD-9604 does not appear to stimulate the same broad growth hormone receptor signaling as full-length hGH. Whether its observed activities arise from direct receptor interactions or downstream metabolic changes is an open question. Results from different assays are not always consistent.
AOD-9604 is a synthetic peptide modeled on the C-terminal region of human growth hormone. It corresponds to residues 176-191 of the 191-amino-acid hGH sequence. The fragment is not the full hormone and lacks the receptor-binding region associated with growth and metabolic effects of hGH. Researchers developed it to isolate a specific portion of hGH for study. Its exact sequence and length are often stated in peptide catalogs and patents.
In laboratory settings, AOD-9604 is commonly supplied as a lyophilized powder and stored cold to limit degradation. Reconstituted solutions are typically kept refrigerated or frozen, depending on the buffer and concentration, and protected from repeated freeze-thaw cycles. Stability can be influenced by pH, temperature, and the presence of proteases. Purity is usually assessed by high-performance liquid chromatography and mass spectrometry. These practices support reproducibility, but they do not imply safety or efficacy for any human use.
Regulatory status: AOD-9604 is not approved as a therapeutic drug in the United States, European Union, or other major markets. It is listed by the World Anti-Doping Agency as a prohibited substance in sport, specifically under growth hormone fragments. Many jurisdictions restrict its sale for human consumption. Products marketed online may not meet pharmaceutical quality standards. The legal status varies by country and often depends on whether the material is presented as a research chemical, supplement, or drug.
Detection and characterization of AOD-9604 in research and anti-doping settings typically rely on mass spectrometry coupled with liquid chromatography. These methods can identify the peptide by its mass and fragmentation pattern. Immunoassays may also be used in some screening contexts, but they can cross-react with related peptides. Because the molecule is small and may be present at low concentrations, sample preparation and method validation are important. Confirmatory analysis usually requires comparison with a certified reference standard.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Derived from a fragment of human growth hormone |
| Sequence basis | hGH residues 176-191 | Commonly described as a 16-amino-acid fragment |
| Appearance | White to off-white powder | Typical for lyophilized research peptides |
| Solubility | Soluble in water or aqueous buffer | Exact solubility depends on pH and purity |
| Common synonyms | AOD9604; hGH 176-191 | Spelling and punctuation vary across sources |
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The number of sponsored research centers grew to 14 during PSI-2. Four centers were selected as Large Scale centers, with a mandate to place 15% effort on targets nominated by the broader research community, 15% on targets of biomedical relevance, and 70% on broad structural coverage; these centers were the Joint Center for Structural Genomics (JCSG), the Midwest Center for Structural Genomics (MCSG), the Northeast Structural Genomics Consortium (NESG), and the New York SGX Research Center for Structural Genomics (NYSGXRC). The new centers participating in PSI-2 included four specialized centers: Accelerated Technologies Center for Gene to 3D Structure (ATCG3D), the Center for Eukaryotic Structural Genomics (CESG), the Center for High-Throughput Structural Biology (CHTSB), a branch of the Structural Genomics of Pathogenic Protozoa Consortium taking that institution's place), the Center for Structures of Membrane Proteins (CSMP), and the New York Consortium on Membrane Protein Structure (NYCOMPS). Two homology modeling centers, the Joint Center for Molecular Modeling (JCMM) and New Methods for High-Resolution Comparative Modeling (NMHRCM) were also added, as well as two resource centers, the PSI Materials Repository (PSI-MR) and the PSI Structural Biology Knowledgebase (SBKB). The TB Structural Genomics Consortium was removed from the roster of supported research centers in the transition from PSI-1 to PSI-2.
== Early life and career == Kennedy was born in Centreville, Mississippi, and raised in Zachary, Louisiana. He graduated from Zachary High School as co-valedictorian in 1969. He then attended Vanderbilt University, where he majored in philosophy, political science, and economics. He graduated in 1973 with a Bachelor of Arts, magna cum laude, and was elected president of his class and to Phi Beta Kappa. Kennedy received a Juris Doctor degree in 1977 from the University of Virginia School of Law. There, he was an executive editor of the Virginia Law Review and, graduating in the top ten percent of his class, he was elected to the Order of the Coif. In 1979, he earned a Bachelor of Civil Law, an advanced degree, with first class honours from Oxford University, where he was a member of Magdalen College and studied under Rupert Cross and J. H. C. Morris. Kennedy was a partner in the New Orleans and Baton Rouge law firm Chaffe McCall from 1985 to 1987 and 1992 to 1996. He also served as an adjunct professor at Louisiana State University's Paul M. Hebert Law Center in Baton Rouge from 2002 to 2016.
=== Armenia === On April 24, 1999, the founding meeting of the International Armenian-Cossack Friendship and Cooperation Association was held in Yerevan. There is a Separate Cossack District of the Great Don Army operating in Armenia. The organization was established by the decision of the Council of Atamans on December 15, 2015. It is a partner of the Ministry of Defense of Armenia.
Passive sub-irrigation, also known as passive hydroponics, semi-hydroponics, or hydroculture, is a method wherein plants are grown in an inert porous medium that moves water and fertilizer to the roots by capillary action from a separate reservoir as necessary, reducing labor and providing a constant supply of water to the roots. In the simplest method, the pot sits in a shallow solution of fertilizer and water or on a capillary mat saturated with nutrient solution. The various hydroponic media available, such as expanded clay and coconut husk, contain more air space than more traditional potting mixes, delivering increased oxygen to the roots, which is important in epiphytic plants such as orchids and bromeliads, whose roots are exposed to the air in nature. Additional advantages of passive hydroponics are the reduction of root rot.
Sources: en.wikipedia.org
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==== MeSH D12.776.220.600.450 – microtubule-associated proteins ==== MeSH D12.776.220.600.450.200 – dynamins MeSH D12.776.220.600.450.200.100 – dynamin i MeSH D12.776.220.600.450.200.200 – dynamin ii MeSH D12.776.220.600.450.200.300 – dynamin iii MeSH D12.776.220.600.450.450 – kinesin MeSH D12.776.220.600.450.480 – stathmin MeSH D12.776.220.600.450.510 – tau proteins
=== Muscle rigidity === If high boluses of fentanyl are administered quickly, muscle rigidity of the vocal cords can make bag-mask ventilation difficult. The exact mechanism of this effect is unknown, but it can be prevented and treated using neuromuscular blockers.
=== Protein synthesis === Expressed protein ligation has been used to prepare O-GlcNAc-modified proteins in a site-specific manner. Methods exist for solid-phase peptide synthesis incorporation of GlcNAc-modified serine, threonine, or cysteine.
The collagenases are capable of degrading triple-helical fibrillar collagens into distinctive 3/4 and 1/4 fragments. These collagens are the major components of bone, cartilage and dentin, and MMPs are the only known mammalian enzymes capable of degrading them. The collagenases are No. 1, No. 8, No. 13, and No. 18. In addition, No. 14 has also been shown to cleave fibrillar collagen, and there is evidence that No. 2 is capable of collagenolysis. In MeSH, the current list of collagenases includes No. 1, No. 2, No. 8, No. 9, and No. 13. Collagenase No. 14 is present in MeSH but not listed as a collagenase, while No. 18 is absent from MeSH. The main substrates of the gelatinases are type IV collagen and gelatin, and these enzymes are distinguished by the presence of an additional domain inserted into the catalytic domain. This gelatin-binding region is positioned immediately before the zinc-binding motif, and forms a separate folding unit that does not disrupt the structure of the catalytic domain. The gelatinases are No. 2 and No. 9. The stromelysins display a broad ability to cleave extracellular matrix proteins but are unable to cleave the triple-helical fibrillar collagens. The three canonical members of this group are No. 3, No. 10, and No. 11. All six membrane-type MMPs (No. 14, No. 15, No. 16, No. 17, No. 24, and No. 25) have a furin cleavage site in the pro-peptide, which is a feature also shared by No. 11.
Sources: en.wikipedia.org
No, it is a synthetic peptide fragment corresponding to a small portion of hGH. It is not the full 191-amino-acid hormone and does not reproduce all of hGH's effects.
It is commonly described as a 16-amino-acid peptide based on residues 176-191 of human growth hormone. Some sources vary in notation, so checking the stated sequence is useful.
It is not typically described as a standalone natural hormone. The sequence is derived from the C-terminal region of human growth hormone, but the synthetic peptide is a laboratory-made construct.
No major regulatory agency has approved AOD-9604 as a medicine. It is treated as an experimental peptide in research settings. Some countries restrict its sale or import.