61756-28-3,Eosinophilotactic Tetrapeptides, straight hair at the source of polypeptide

Dirction：CAS 61756-28-3, Ala-Gly-Ser-Glu, also named Eosinophilotactic Tetrapeptide. White lyophilized powder with purity ≥98%. Widely used for immunology and inflammation research. Strict quality control via HPLC & MS. Custom synthesis and flexible packaging available. For laboratory research only, not for clinical use.

Basic information:

Brand: solid extension

appearance: white powder

storage: shading, cool and dry, sealed preservation purity: ≥ 99% main purpose: polypeptide research use

Implementation standard: enterprise standard

mg/g/kg (subject to customer requirements)

Sales Scope: Global

Peptide FAQ:

1. custom peptide activity can be guaranteed?

the activity of a custom polypeptide is influenced by a number of factors. What Gutuo Biotechnology Co., Ltd. can guarantee is that the product sequence is correct (Mass result guarantee) and the purity is up to standard (HPLC result guarantee). For activity, since there is no special test method, it cannot be guaranteed.

Several factors may be helpful in ensuring activity:

A. Generally, the finished customized polypeptide is in the form of TFA salt. If the customer needs to study the charge of the polypeptide, etc., the polypeptide needs to be desalted.

B. Typically the finished custom polypeptide is in the form of a TFA salt, and some customers will require conversion to an acetate salt.

2. custom polypeptide can guarantee polypeptide in a specific solution of solvent?

we cannot predict the solubility of a polypeptide in water by studying its structure. We cannot guarantee the solubility of the final product in water or other solvents.

However, the ε-amino group of lysine and guanidine of arginine often help to predict solubility, especially for short peptides. In contrast, acidic peptides containing aspartic acid and glutamic acid tend to be poorly soluble in water, but are readily soluble in dilute aqueous ammonia or alkaline buffers.

If more than 10mg of polypeptide is ordered, Solid Biology can test the dissolution of 1mg of polypeptide in 0.5~1ml DMF and water at room temperature,