Peptides

<p>Fragment of the angiotensin-converting enzyme 2 (ACE2) peptidase domain (PD) alpha1 helix, a domain important for the interaction of ACE2 with the severe acute respiratory syndrome (SARS coronavirus receptor binding domain (SARS-CoV-2-RBD). SBP1 associates with the SARS-CoV-2-RBD with nanomolar affinity and can potentially block the key mechanism by which SARS CoV-2 initiates entry into human cells.</p>

<p>This C-terminal Sortagging peptide acts as a (oligo)glycine nucleophile in the final steps of a sortagging protein labelling reaction. This reaction results in the [Lys(5-TAMRA)]- fluorescent moiety being attached to the C-terminus of the target protein or peptide.A substrate peptide containing the LPXTG motif is recognised and cleaved by the enzyme Sortase A (SrtA) from Staphylococcus aureus. The catalytic cysteine residue in the active site of SrtA, serves as a nucleophile to cleave the peptide bond between threonine and glycine of the substrate peptide. Cleavage results in the formation of a thioacyl intermediate between the substrate peptide and SrtA. This intermediate is then resolved by the N-terminus of this (oligo)glycine nucleophile peptide, resulting in the creation of a new peptide bond that links the substrate peptide to this peptide and its fluorescent dye.  This method of protein labelling is known as sortagging.5-Carboxytetramethylrhodamine (5-TAMRA) is a widely used fluorescent dye which excites at 546 nm and emits at 579 nm.</p>

<p>Insulin is a peptide hormone produced by β cells of the pancreatic islets that regulates carbohydrates metabolism. It is a heterodimer of an A-chain and a B-chain, which are linked together by disulfide bonds. Insulin stimulates the absorption of glucose from the blood into fat, muscle and liver cells where it is converted into either glycogen or fat.Insulin is secreted in the blood as a response to high level of blood glucose resulting in enhanced glucose uptake and metabolism in the cells so to reduce blood glucose levels. Circulating insulin also affects the synthesis of proteins in many tissues. Low blood insulin levels result in catabolism, particularly of reserve body fat. A decrease or absence of insulin activity results in diabetes mellitus, a condition of high blood sugar level (hyperglycaemia).N-terminal chain B labelled with AF488. AF488 dye is a bright, green-fluorescent dye with excitation maxima around 490 and emission maxima around 525. AF488 dye is pH-insensitive over a wide molar range.</p>

<p>Peptide H-NFLINETAR^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>GPS1573 is a potent and dose-dependent peptide antagonist of adrenocorticotrophic (ACTH) -stimulated melanocortin type 2 receptor (MC2R). Along with GPS1574, GPS1773 is an ACTH analogue and as such antagonises MC2R in the nanomolar range.The clinical relevance of GPS1573 is related to Cushing's disease and syndrome, which are both associated with a hypercortisolemic state. Selective antagonism of MC2R using GPS1573 may be a novel treatment modality for Cushing's disease and syndrome.</p>

<p>Biotin-PEG2-Claudin-3 is derived from the tight junction protein Claudin-3 which is encoded by the CLDN3 gene located on chromosome 7q11.23 and can be found within epithelial cell to cell contacts. Structurally, the Claudin family are transmembrane proteins containing two extracellular loops and are involved in maintaining cell polarity and controlling paracellular ion flux.During cancer research reduction in the number of Claudins has been associated with tumour formation. This could be explained using Claudin role in maintaining cell detachment and migration although cancers such as breast and prostate have shown to overexpress both Claudin- 3 and Claudin-4. Similarly in ovarian cancer overexpression of Claudin 3 and 4 is thought to increase the motility of tumour cells and their survival through basement membrane degrading matrix metalloproteinase activation.Both Claudin 3 and 4 have potential to be used as diagnostic markers and their two extracellular loops may be used as targets for antibodies. As receptors for the Clostridium perfringens enterotoxin, Claudin 3 and 4 may have further use in targeting the enterotoxin as a therapeutic for ovarian cancers.This peptide has a covalently bonded N-terminal Biotin tag that can be used for detection and purification and contains a polyethylene glycol spacer (PEG2).</p>

<p>Peptide H-YLWEWASVR^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Substance P (SP) is a peptide that is highly conserved across the animal kingdom and is involved in a number of inflammatory and growth promoting processes. SP has a net positive charge at physiological pH, it is an amphiphilic peptide with positively charged residues at the N-terminus and hydrophobic residues at the C-terminus, this controls how it interacts with cell membranes. SP is relatively stable in plasma (several hours) but has a short half-life in tissues (seconds/minutes).SP is encoded by the TAC1 gene and is a member of the tachykinin peptide hormone family. SP is expressed by many cell types including: neurons- astrocytes- microglia- epithelial cells- endothelial cells- immune cells such as T cells and macrophages- dendritic cells and eosinophils and some stem cells and progenitor cells. The huge variety of cell types expressing SP suggest it is involved in a wide variety of physiological and pathophysiological functions.SP mediates its functions by interacting with members of the neurokinin (NK) family of G protein-coupled receptors with high selectivity. Among these, SP binds to NK1R with the highest affinity, this receptor is expressed in a wide range of tissue types.[5-FAM]-Substance P contains 5-Carboxyfluorescein (5-FAM), a widely used green fluorescent tag.</p>

<p>Peptide H-DFTPAAQAAFQK^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Alpha-2-antiplasmin (alpha2AP), a member of the serine protease inhibitor (SERPIN) superfamily, is the main inhibitor of the fibrinolytic enzyme plasmin as well as an inhibitor of trypsin, elastase, and C protein. It plays a crucial role in reducing plasmin production and activity and thus inhibiting fibrinolysis.alpha2AP is synthesized in the liver and secreted as a single-chain glycoprotein, containing 11-14% carbohydrate, with a methionine (Met) as its N-terminus (Met-alpha2AP). The N-terminus of alpha2AP is involved in the incorporation of alpha2AP into a clot and the C-terminus is involved in the initial interaction of alpha2AP with plasmin(ogen). Circulating alpha2AP undergoes both N-and C-terminal modifications, which alter its activity. Increased concentrations of a2AP are associated with a higher risk of cardiovascular diseases.</p>

<p>Peptide H-ALLFIPR^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Peptide H-G^PSLFPLAPSSK^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Fluorogenic substrate for thrombin that when in its intact state does not fluoresce, however upon cleavage by thrombin in 2 successive steps, Rhodamine 110 is released to allow fluorescence.Thrombin is a multifunctional serine protease and is the principal enzyme of hemostasis. It catalyzes the conversion of fibrinogen to fibrin and activates procoagulant factors V, VIII, XI, and XIII. When bound to thrombomodulin, it activates protein C, an anticoagulant zymogen. Thrombin also activates platelets, regulates endothelial cell function, and has a host of direct actions on other cells. Thrombin has been found to act as a mediator of vascular dysfunction and inflammation in both the peripheral and the central nervous systems. Thrombin contributes to the development of cardiovascular disease, atherosclerosis and diabetes and promotes vascular dysfunction, inflammation, and neurodegeneration. Thrombin is elevated in the brains of people with Alzheimer's disease (AD) and therefore may be a therapeutic target in AD.</p>

<p>Peptide H-HNLFEPEDTGQR^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Glycine proline (Gly-Pro) dipeptide is a bioactive collagen hydrolysate. Ingestion of collagen hydrolysate improves skin health. Gly-Pro ingestion specifically attenuates UVB-induced damage including wrinkle formation, trans-epidermal water loss, and epidermis thickness- Gly-Pro also increases skin hydration.</p>

<p>Peptide LCBiot-KPVSKMRMATPLLMQAL-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Peptide H-VLPVPQK^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Custom research peptide; min purity 95%. For different specs please use the Peptide Quote Tool</p>

<p>Peptide H-LLDEVTYLEASK^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>

<p>Peptide H-EQQCVIMAENR^-OH is a Research Peptide with significant interest within the field academic and medical research. This peptide is available for purchase at Cymit Quimica in multiple sizes and with a specification of your choice.</p>