N-Acetyl lysyltyrosylcysteine amide/1287585-40-3/Custom peptide

Description

N-Acetyl lysyltyrosylcysteine amide is an effective, reversible, specific, and non-toxic tripeptide inhibitor of myeloperoxidase (MPO),whic is composed of 3 amino acids with blocked ends of the peptide. N-Acetyl lysyltyrosylcysteine amide is effective in inhibiting MPO production of toxic oxidants in vivo. N-Acetyl lysyltyrosylcysteine amide mitigates neuronal damage in the brain after stroke and preserves brain tissue and nerve function. N-Acetyl lysyltyrosylcysteine amide inhibits MPO-dependent hypochlorous acid (HOCl) production, protein nitrification, and LDL oxidation.

Specifications

Apperance: White to off-white powder

Purity(HPLC): ≥98.0%

Single Impurity: ≤2.0%

Acetate Content(HPLC): 5.0%～12.0%

Water Content (Karl Fischer): ≤10.0%

Peptide Content: ≥80.0%

Packing and Shipping: Low temperature, vacuum packing, accurate to mg as required.

FAQ：

What are the advantages of Pharmaceutical Peptide?
The rapid development of Pharmaceutical Peptide benefits from their significant advantages:

• Significant activity, relatively strong specificity, good affinity for receptors, lower toxicity, and not easily accumulating in the body;

• Compared to protein-based macromolecular drugs, except for peptide vaccines, peptide drugs have relatively low immunogenicity, require smaller dosages, and have higher unit activity;

• Easy to modify and produce, and can even be addressed through synthetic methods.

How is the solubility of peptides? 

The solubility of peptides is influenced by various factors, including amino acid sequence, charge, hydrophilicity and hydrophobicity, etc. When dissolving peptides, it is recommended to conduct a small-scale solubility test first, and after confirming complete dissolution, proceed with dilution. Go top bio provides solubility testing services.

I need a cyclic peptide, which contains a tryptophan, will it be oxidized?

The oxidation of tryptophan is a common phenomenon in peptide oxidation, and peptides are usually cyclized before purification. If the oxidation of tryptophan occurs, the retention time of the peptide on the HPLC column will change, and the oxidation can be removed by purification. Furthermore, oxidized peptides can also be detected by MS.

Were the peptides containing Cys reduced before shipment?

If the peptide is not found to have been oxidized, we generally do not reduce Cys. All polypeptides are obtained from crude products purified and lyophilized under pH2 conditions, which at least to some extent prevent the oxidation of Cys. Peptides containing Cys are purified at pH2 unless there is a specific reason to purify at pH6.8. If purification is performed at pH6.8, the purified product must be treated with acid immediately to prevent oxidation. In the final quality control step, for the peptides containing Cys, if the presence of molecular weight (2P+H) substance is found on the MS map, it indicates that a dimer has been formed. If there is no problem with MS and HPLC, we will directly lyophilize and ship the goods without any further processing. It should be noted that peptides containing Cys undergo slow oxidation over time, and the degree of oxidation depends on peptide sequence and storage conditions.

How To Order?

1. Contact us directly by phone or email: +86-13735575465, sales1@gotopbio.com.

2. Order online. Please fill out the order online form.

3. Provide peptide name, CAS No. or sequence, purity and modification if required, quantity, etc. we will provide a quotation within 2 hours.

4. Order conformation by duly signed sales contract and NDA(non disclosure agreement) or confidential agreement.

5. We will continuously update the order progress in time.

6. Peptide delivery by DHL, Fedex or others, and HPLC, MS, COA will be provided along with the cargo.

7. Refund policy will be followed if any discrepancy of our quality or service.

8. After-sale service: If our clients have any questions about our peptide during experiment, please feel free to contact us and we will respond to it in a short time.

All products of the company are only used for scientific research purpose, it’s prohibited to be directly used by any individuals on human body.