STh vendor/118447-40-8/Peptide R&D

STh is a heat-stable toxin of E. coli that consists of 19 amino acids. Its peptide structure contains three disulfide bonds and it is very hydrophobic.

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：

Why should peptides be modified by N-terminal acetylation and C-terminal amidation?
Such modifications can give peptide sequences properties that are native to proteins.

What are the applications of peptide libraries?
Peptide libraries are an efficient tool for many studies, including GPCR ligand screening, protein-protein interaction studies, functional proteomics, nucleotide binding, screening of enzymatically acting substrates and inhibitors, antigen and epitope screening, signaling molecule search, and other important processes of drug screening.

What are the differences between peptides and proteins?

Peptides and proteins are both composed of amino acids, but they differ in molecular weight and length. Generally, those with a molecular weight less than 10,000 daltons (Da) and shorter amino acid chains are called peptides, while those with a larger molecular weight and longer amino acid chains are referred to as proteins.

Are polypeptides harmful to humans?

Peptides, which are naturally present in the human body, are generally safe for use. However, some peptides may have specific pharmacological activities, and it is advisable to consult with a doctor or a professional before using them.

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.