Explore peptide science, one profile at a time

Research pentadecapeptide (gastric-juice-derived sequence)

BPC-157 (Body Protection Compound-157) is a synthetic 15-residue peptide, GEPPPGKPADDAGLV, derived from a sequence found in human gastric ju…

Synthetic thymosin β4 fragment (research peptide)

TB-500 is the synthetic, N-acetylated heptapeptide Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (Ac-LKKTETQ), corresponding to residues 17–23 of thymosin …

Incretin dual agonist

Tirzepatide is a 39-amino-acid synthetic peptide (C225H348N48O68, ≈4,814 Da) that activates both the GIP and GLP-1 receptors. Its backbone i…

Incretin triple agonist

Retatrutide (LY3437943) is an investigational 39-amino-acid peptide (C221H342N46O68, ≈4,731 Da) that activates three receptors — GIP, GLP-1 …

Incretin

Glucagon-like peptide-1 (GLP-1) is a 30–31-residue incretin hormone released by intestinal L-cells after a meal. It potentiates glucose-depe…

Incretin analog

Semaglutide is a 31-amino-acid GLP-1 receptor agonist peptide (C187H291N45O59, ≈4,114 Da). It keeps 94% of the human GLP-1 sequence but subs…

Long-acting GHRH analogue (research compound)

CJC-1295 (C165H269N47O46, ≈3,647 Da) is a 30-residue analogue of growth hormone-releasing hormone(1-29) engineered by ConjuChem to bind seru…

Growth hormone secretagogue (research compound)

Ipamorelin (NNC 26-0161) is a synthetic pentapeptide — Aib-His-D-2-Nal-D-Phe-Lys-NH2 (C38H49N9O5, ≈712 Da) — developed by Novo Nordisk as th…

GHRH analogue (former prescription medicine)

Sermorelin is a synthetic 29-amino-acid peptide (C149H246N44O42S, ≈3,358 Da) that reproduces the amino-terminal, biologically active segment…

Research peptide

AOD-9604 is a synthetic 16-residue peptide based on the C-terminal region of human growth hormone (residues 177–191 with an added N-terminal…

Research peptide

Epithalon (epitalon) is the synthetic tetrapeptide Ala-Glu-Asp-Gly (AEDG), designed from the amino-acid composition of epithalamin, a bovine…

Research compound

MK-677 (ibutamoren) is an orally active ghrelin receptor agonist often searched alongside peptide GH secretagogues. It is a small molecule, …

Cyclic melanocortin-receptor agonist (unlicensed research peptide)

Melanotan II is a synthetic cyclic heptapeptide analogue of α-melanocyte-stimulating hormone (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2) t…

Research peptide

GHRP-2 (pralmorelin) is a synthetic growth hormone–releasing peptide that acts at the ghrelin receptor. It is a foundational compound in GH …

Research peptide

GHRP-6 is a synthetic hexapeptide growth hormone secretagogue acting at the ghrelin receptor, frequently discussed for GH release and appeti…

Antimicrobial

LL-37 is the active 37-residue peptide from human cathelicidin, a cornerstone molecule in antimicrobial peptide and innate immunity research…

Research / clinical peptide

Thymosin alpha-1 is a 28-amino-acid immune-modulating peptide used or approved in some countries and widely studied in immunology research w…

Research peptide

KPV is the tripeptide Lys-Pro-Val, the C-terminal fragment of α-melanocyte-stimulating hormone. At nanomolar concentrations it inhibits NF-κ…

Modified insulin-like growth factor 1 (research protein)

IGF-1 LR3 (Long R3 IGF-1) is a recombinant 83-amino-acid analogue of human insulin-like growth factor 1, engineered for use as a laboratory …

Amylin analog (dual amylin / calcitonin receptor agonist)

Cagrilintide is an investigational 37-amino-acid analogue of the pancreatic hormone amylin (C194H312N54O59S2, ≈4,409 Da). Six substitutions …

Unimolecular GLP-1 / amylin receptor co-agonist

Amycretin (NN9487) is an investigational Novo Nordisk peptide that activates both the GLP-1 receptor and amylin receptors from a single chai…

Hormone

Insulin is a 51-amino-acid peptide hormone that regulates blood glucose. It is the foundational peptide therapeutic and a reference point fo…

Cyclic melanocortin-receptor agonist (approved medicine)

Bremelanotide, developed as PT-141, is a cyclic seven-residue analogue of α-melanocyte-stimulating hormone that activates melanocortin recep…

Cosmetic / research peptide

GHK-Cu is the copper(II) complex of glycyl-L-histidyl-L-lysine, a tripeptide found in human plasma at about 200 ng/mL at age 20 and 80 ng/mL…