Pro-Phe-Phe, a highly aggregation-prone tripeptide composed of natural amino acids, exhibits the formation of distinctive helical-like sheets that engage in aromatic dry interfaces. This property makes Pro-Phe-Phe an excellent candidate for the development of modular super-helical self-assembling nanostructures.

Nonapeptide-1 (Melanostatine™ 5) can inhibit the synthesis of melanin, which makes it of interest for treating certain skin conditions.

N-terminally acetylated Endomorphin-1 acetate (Ac-L-Tyr-L-Pro-L-Trp-L-Phe-CONH2) is a modified Endomorphin-1.

Z-Gly-Pro-Phe-Leu-CHO (Z-GPFL-CHO) is a tetrapeptide aldehyde serving as a selective and potent proteasome inhibitor, demonstrating inhibition constants (Ki) of 1.5 µM, 2.3 µM, and 40.5 µM for branched-chain amino acid-preferred, small neutral amino acid-preferred, and chymotrypsin-like activities, respectively, and an inhibitory concentration (IC50) of 3.1 µM for peptidyl-glutamyl peptide hydrolyzing activity [1].

Suc-Val-Pro-Phe-SBzl (succinyl-valine-proline-phenylalanine thiobenzyl ester) acts as a CatG enzyme inhibitor, exhibiting IC50 values ranging from 111 to 225 mM.

MeOSuc-AAPF-CMK (MeOSuc-Ala-Ala-Pro-Phe-CH2Cl) is a potent inhibitor of the enzyme proteinase K [1].

Locustapyrokinin II is a member of the FXPRL-amide peptide family isolated from Locusta migratoria.

Cyclo(Phe-Pro) acetate(14705-60-3 free base), known as a secondary metabolite of some bacteria and fungi, is also produced by Vibrio vulnificus.

Y16 acetate(429653-73-6 free base) is a G-protein–coupled Rho GEFs inhibitor; works synergistically with Rhosin/G04 in inhibiting LARG-RhoA interaction, RhoA activation, and RhoA-mediated signaling functions.

PPACK is a synthetic peptide derivative. It also irreversibly and specifically inhibits thrombin-mediated platelet activation by binding with high affinity to the active site of thrombin (Ki = 0.24 nM).

[Leu15]-Gastrin I human (Amino Acid Sequence Glp-Gly-Pro-Trp-Leu-Glu-Glu-Glu-Glu-Glu-Ala-Tyr-Gly-Trp-Leu-Asp-Phe-NH2) encodes for the protein [Leu15]-Gastrin I in human. In human chromosome, the gene GAST is localized on 17q21.2. G cells in the stomach antrum produces the precursor of [Leu15]-Gastrin I, progastrin.Progastrin undergoes cleavage and processing to yield gastrin, which is trophic for the entire gastrointestinal epithelium. Gastrin is essential for the growth of the digestive system and stimulates the production of gastric acid by parietal cells. Gastrin exerts its function through G-protein-coupled receptor called the cholecystokinin (CCK) or CCK-B receptor (CCK-BR). Gastrin release is stimulated by food, especially protein diet and is inhibited by very low pH. Atrophic gastritis, a Helicobacter pylori infection and long-term administration of proton pump inhibitors infection may cause overexpression of gastrin. Gastric adenocarcinoma show high levels of gastrin.

Felypressin (Octapressin) is a synthetic analog of LYPRESSIN with a PHENYLALANINE substitution at residue 2. Felypressin is a vasoconstrictor with reduced antidiuretic activity.

[Leu144,Arg147]-PLP (139-151) is a mutated fragment of the myelin proteolipid protein (PLP), featuring substitutions of tryptophan to leucine and histidine to arginine at positions 144 and 147, respectively. Immunizing mice with this peptide (50 µg) mixed in complete Freund’s adjuvant (CFA) elevates IL-4 levels in the spleen. While it suppresses Th1 cell activation in vitro, it does not do so in vivo; instead, it promotes the development of regulatory T cells. Preimmunization with [Leu144, Arg147]-PLP (139-151) postpones the onset of experimental autoimmune encephalomyelitis (EAE) triggered by encephalitogenic peptides from PLP (178-191), myelin oligodendrocyte glycoprotein (MOG) (92-106), or myelin basic protein (MBP) in mice.

H-Pro-Thr-Glu-Phe-p-nitro-Phe-Arg-Leu-OH is a water-soluble polypeptide capable of acting as a substrate for enzymes cathepsin D, pepsin, and pepsinogen, holding potential applications in biochemical analysis [1] [2].

Carbomethoxycarbonyl-D-Pro-D-Phe-OBzl is an HIV-1 inhibitor that functions by interacting with gp120, thereby preventing its binding to CD4. This mechanism helps to maintain CD4-dependent T cell function.

WT-1 A1 is an attractive target for immunotherapy in patients with pancreatic adenocarcinoma.

Felypressin acetate (PLV-2) is an agonist of vasopressin 1 and acts on all arginine vasopressin receptors 1AS. Felypressin acetate can be used in dental procedures.

Renin inhibitory peptide is an analog of angiotensinogen.

Cys-Arg-Gly-Asp-Phe-Pro-Ala-Ser-Ser-Cys (Disulfide bridge: Cys1-Cys10), a decapeptide with a cyclic RGD active sequence, acts as an Integrin αIIbβ3 antagonist, effectively inhibiting platelet adhesion and proMMP-13 adhesion [1].

VV-Hemorphin-7 is a morphinomimetic peptide.

D-Pro-Phe-Arg-Chloromethylketone, an inhibitor of coagulation factor XII and plasma kallikrein, is significant in the regulation of thrombosis and inflammation [1].

H-Pro-Phe-OH, a dipeptide composed of proline and phenylalanine, functions both as a substrate for prolinase and in polypeptide synthesis. Phenylalanine, an aromatic amino acid within this compound, has the capability to inhibit the activity of Angiotensin-converting enzyme (ACE) [1] [2].

Hexapeptide-11 is a novel proteostasis network modulator in human diploid fibroblasts.

Antho-rpamide II is a biologically active neuropeptide isolated from the sea anemone Anthopleura elegantissima.

N-terminally acetylated Endomorphin-1 is a modified Endomorphin-1.

Fmoc-Phe-Thr(psi(Me,Me)pro)-OH is a useful organic compound for research related to life sciences. The catalog number is T64451 and the CAS number is 1196703-48-6.

Renin inhibitory peptide, statine is a effective, specific statine-containing renin inhibitor.

Locustamyotropin is a novel peptide isolated from Leucophae maderae; stimulates the spontaneous contractions of the hindgut of Leucophaea maderae.

Suc-Ala-Leu-Pro-Phe-pNA (Suc-ALPF-pNA), a substrate for FK-506 binding protein (FKBP) [1], showcases the intricate interactions necessary for specific biochemical assays.

Leucopyrokinin is a myotropic neuropeptide.

Cyclo(Phe-Pro) (A-64863) known as a secondary metabolite of some bacteria and fungi, is also produced by Vibrio vulnificus.

CH 5450 (Z-Ile-Glu-Pro-Phe-Ome) (Z-Ile-Glu-Pro-Phe-Ome) is a short peptide inhibitor of chymase in the human heart

R 715, a bradykinin B1 receptor antagonist, inhibits contractions in isolated human umbilical cords that express bradykinin B1 receptors (pA2 = 8.49). When administered at doses of 200, 400, and 600 µg/kg, R 715 enhances latency to tail withdrawal in the tail-flick test for diabetic neuropathy mouse models induced by streptozotocin (STZ), signaling potential analgesic properties. Furthermore, at a 1 mg/kg per day dosage, it mitigates symptoms in a mouse model of experimental autoimmune encephalomyelitis (EAE) induced by MOG35-55 antigen peptide, such as reducing hind limb weakness and paralysis, improving gait symmetry, and decreasing spinal inflammation, neuron demyelination, and lesion monocyte invasion. Additionally, R 715 at 0.01 nmol/animal, administered intracerebroventricularly (i.c.v.), lowers mean arterial blood pressure and increases heart rate in spontaneously hypertensive rats, indicating cardiovascular effects.

Suc-AEPF-AMC (Suc-Ala-Glu-Pro-Phe-AMC) is a peptide substrate for the peptidyl prolyl isomerases Pin1 and Par14, and is a peptide compound that can be used to assay protease activity.

Suc-Ala-Ala-Pro-Phe-SBzl serves as a substrate for rat intestinal mast cell protease (RMCP I), rat skeletal muscle mast cell protease (RMCP II), and Chymotrypsin. Additionally, it undergoes hydrolysis by glycine (R208G) [1] [2].

alpha-Gliadin (43-49) is a Gliadian sequence peptide. It could induce leukocyte migration inhibition but be blocked by naloxone.

Pro-Adrenomedullin(153-185),human, (C143H224N42O43), a peptide with the sequence H2N-SLPEAGPGRTLVSSKPQAHGAPAPPSGSAPHFL-OH, MW= 3219.6. Adrenomedullin (AM) is a ubiquitously expressed peptide initially isolated from phaechromyctoma in 19931. AM was initially identified as a vasodilator, some have cited this as the most potent endogenous vasodilatory peptide found in the body2. Differences in opinion regarding the ability of AM to relax vascular tone arises from the differences in the model system used3. Other effects of AM include increasing the tolerance of cells to oxidative stress and hypoxic injury and angiogenesis. AM is seen as a positive influence in diseases such as hypertension, myocardial infarction, chronic obstructive pulmonary disease and other cardiovascular diseases, whereas it can be seen as a negative factor in potentiating the potential of cancerous cells to extend their blood supply and cause cell proliferation.

Acetyl Angiotensinogen (1-14), porcine Acetate is a peptide with the sequence AC-ASP-ARG-VAL-TYR-ILE-HIS-PRO-PHE-HIS-LEU-LEU-VAL-TYR-SER-OH. The protein encoded by the Angiotensinogen gene is known as pre-angiotensinogen or angiotensinogen precursor.

Ser-parafluoroPhe-Aad-Leu-Arg-Asn-Pro-NH2 is a biologically active peptide. Structure-activity studies of the thrombin receptor-tethered ligand SFLLRNP underscored the pivotal role of the Phe-2-phenyl group in receptor recognition, while substitution with para-fluorophenylalanine [(p-F)Phe] augmented its activity.

a-MSH, amide is a peptide with the sequence Ac-Ser-Tyr-Ser-Met-Glu-His-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2, MW= 1664.9. The melanocyte-stimulating hormones (collectively referred to as MSH or intermedins) are a class of peptide hormones that are produced by c

Gap 27 is a peptide(Ser-Arg-Pro-Thr-Glu-Lys-Thr-Ile-Phe-Ile-Ile) derived from connexin 43 that is a selective gap junction blocker.

Ribosomal protein L3 peptide (202-222) is a peptide with the sequenceH2N-Met-Ser-His-Arg-Lys-Tyr-Glu-Ala-Pro-Arg-His-Gly-His-Leu-Gly-Phe-Leu-Pro-Arg-Lys-Arg-amide, MW=2573.

Angiotensin 1/2 (1-8) amide (H2N-Asp-Arg-Val-Tyr-Ile-His-Pro-Phe-amide) is a peptide analog to angiotensin II that is used as a vasopressor agent in the treatment of certain types of shock and circulatory collapse. It is a potent vasoconstrictor and is us

Substance P (alligator), a neuropeptide derived from alligator, possesses a primary structure delineated as Arg-Pro-Arg-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-NH2 [1].

Amyloid precursor c-terminal peptide has the amino acid sequence Gly-Tyr-Glu-Asn-Pro-Thr-Tyr-Lys-Phe-Phe-Glu-Gln-Met-Gln-Asn. APP is best known as the precursor molecule whose proteolysis generates beta-amyloid (Aβ), a 37 to 49 amino acid peptide whose am

Interleukin II (60-70) is a peptide with the sequence NH2- LEU-THR-PHE-LYS-PHE-TYR-MET-PRO-LYS-LYS-ALA-COOH, MW= 1373.7. Interleukin 2 (IL-2) is a type of cytokine signaling molecule in the immune system, and it regulates the activities of the white blood

Heparin cofactor II precursor (SERPIND1) fragment [Homo sapiens] is a peptide with the sequence H2N-Phe-Thr-Val-Asp-Arg- Pro-Phe-Leu-Phe-Leu-Ile-Tyr-Glu-His-Arg-OH, MW=1953.25.