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Type
Synthetic peptide (29 residues, C-terminal amide)
Molecular formula
C149H246N44O42S
Molecular weight
~3,358 g/mol
CAS number
86168-78-7
Amino acids
29
Sequence
Tyr-Ala-Asp-Ala-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-NH2
Modification
C-terminal amidation; sequence corresponds to residues 1-29 of human GHRH (the N-terminal fragment that retains intrinsic activity).
A synthetic 29-residue C-terminally amidated peptide corresponding to the N-terminal fragment (residues 1-29) of a 44-residue hypothalamic peptide - the minimal segment that retains the intrinsic structural activity of the longer parent. Solution NMR in a membrane-mimetic solvent describes substantial alpha-helical character, and cryo-EM of the peptide bound to its class B1 (secretin-like) G-protein-coupled receptor complex resolves a continuous alpha-helical conformation contacting the receptor extracellular domain, extracellular loops, and transmembrane helices. Binding is described by a two-domain ('two-step') model in which the peptide engages both the receptor extracellular domain and its transmembrane core. As a small unmodified peptide it carries a single oxidation-sensitive methionine and is characterized by rapid circulatory clearance, distinguishing it from chemically stabilized analogs bearing acyl or amino-acid-substitution modifications.
Lyophilized
20°C (-80°C long term)
powder protected from light, typically stable many months desiccated.
Avoid freeze-thaw; aliquot; protect from light and moisture. Contains an oxidation-sensitive methionine.
Reviews
Granata R, et al. (2025). Nat Rev Endocrinol
Montero-Hidalgo AJ, et al. (2025). Rev Endocr Metab Disord
Reviews
Walker RF. (2006). Clin Interv Aging
Lin-Su K, Wajnrajch MP. (2002). Rev Endocr Metab Disord
Prakash A, Goa KL. (1999). BioDrugs
Clinical
Baker LD, et al. (2012). Arch Neurol
Khorram O, et al. (1997). J Clin Endocrinol Metab
Vittone J, et al. (1997). Metabolism
Thorner M, et al. (1996). J Clin Endocrinol Metab
Corpas E, et al. (1992). J Clin Endocrinol Metab
ClinicalTrials.gov. ClinicalTrials.gov
Primary research
Zhou F, et al. (2020). Nat Commun
Kanashiro-Takeuchi RM, et al. (2012). Proc Natl Acad Sci USA
Kanashiro-Takeuchi RM, et al. (2010). Proc Natl Acad Sci USA
Godfrey P, et al. (1993). Nat Genet
Mayo KE. (1992). Mol Endocrinol
Theriault Y, et al. (1988). Biopolymers
Ling N, et al. (1984). Proc Natl Acad Sci USA
Rivier J, et al. (1982). Nature
Guillemin R, et al. (1982). Science
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