What is HGH 191AA (Somatropin)?
Somatropin is a single-chain protein of 191 amino acids with two disulfide bridges. It is produced recombinantly; the amount in international units (IU) refers to biological activity (1 mg ≈ 3 IU).
More data in the lexicon entry on Somatropin.
State of research
Somatropin has been produced recombinantly since 1985 and is one of the longest-studied protein hormones. It binds two growth hormone receptor molecules at once, activates the kinase JAK2 and the transcription factor STAT5, and stimulates IGF-1 production in the liver.
In research, HGH 191AA is the reference when studying how strongly secretagogues such as GHRH analogues or ghrelin mimetics stimulate the body's own release. "191AA" distinguishes the full protein from fragments such as HGH fragment 176-191.
Status and quality
Somatropin is approved as a prescription medicine and is on the WADA Prohibited List. The material offered here is not a medicinal product. Peptidkauf sells HGH 191AA (Somatropin) solely as a research reagent for laboratory and in-vitro use and gives no dosing or application advice.
An independent laboratory tests every batch for purity (HPLC), identity and measured content before it goes on sale; the reports and their verification keys are in the lab report archive. The material ships as lyophilised powder in a glass vial; storage and laboratory handling are covered under storage & handling.
Related products and articles
IGF-1 variants for cell culture: IGF-1 LR3 and IGF-1 DES. GHRH analogues: sermorelin, CJC-1295 DAC.
