Preservation of freeze-dried peptides

The polypeptide labeled "freeze dry preservation" should be kept under the freezing condition, with the best -20 DEG C, and its activity can be maintained for many years. When using frozen products, the containers should be raised to the room temperature in fresh dry containers before opening. -20 DEG C, this process takes an hour or longer, depending on the warranty. Otherwise, when the container is opened, resulting in condensation of water vapor into the lower stability. Once opened, should be promptly closed after weighing, in order to avoid the deliquescence immediately, more attention should be paid to the hydrophilic peptide.

Preservation of dissolved polypeptides

Polypeptide solution is much less stable than dry powder, in order to achieve better results, follow the following principles:

1 into a small package to avoid repeated freeze-thaw. How much thawing.

2 soluble in PH5-7 sterile buffer, -20 storage.

3 because bacteria can degrade peptides, bacteria should be filtered before storage.

4 peptides containing Cys, Met, Try, Glu, and Asp are prone to oxidation, and should therefore be kept in an oxidizing free environment