Peptide Storage and Handling Guidelines |
 |
All GenScript peptides are supplied lyophilized and should be stored and handled according to the following guidelines.
Storage Guidelines for Lyophilized Peptides:
Lyophilized peptides should be refrigerated and stored away from bright light. For short-term storage ranging from one week to two months, lyophilized peptides may be stored at 4℃. For long-term storage, lyophilized peptide should be stored at -20℃ in deep freezer. Even though this condition keeps most peptides stable for several years, peptides' long term stability is at risk when peptides expose to moisture, therefore, the vial should be tightly capped at all times. This also requires careful experiment planning to minimize vial openings.
Peptide Solutions Storage Guideline:
Do not store excessive peptides in solution because the shelf life of peptides in solution is very limited, much shorter than lyophilized peptides. This is especially true for peptides whose sequences contain cysteine, methionine, tryptophan, asparagine, glutamine, or N-terminal glutamic acid. It is necessary to aliquot the amount of peptide you need for the day and re-lyophilize the remaining peptide solution. Another drawback is that peptides stored in solution are susceptible to bacterial degradation. If storage of peptide in solution is unavoidable, use sterile buffers at pH 5-6 and store aliquots at -20℃ and pass the peptide solution through a 0.2 µM filter to rid the bacteria.
Preparation for Use:
When preparing peptides for use, please consult GenScript's following guidelines:
- Warm the peptide vial to room temperature before opening.
- Weigh out the desired quantity of peptide quickly.
- Reseal the vial tightly.
- Store the remaining peptide in a freezer, preferably below -20℃, under dry conditions.
Avoid repeated freeze and thaw cycles for both lyophilized peptides and peptide solutions. If frequent and periodical sample takings from storage are unavoidable, GenScript recommends making a series of aliquots in advance.
Due to the fact that peptides whose sequences containing cysteine, methionine, or tryptophan are prone to air oxidation. It is recommended that air be purged from the peptide storage vial and replaced with inert gases such as argon or nitrogen for storage.
Delivery Specifications:
All peptide synthesis is subject to GenScript's stringent quality control. The typical delivery consists of lyophilized peptide of the required sequence, purity, and quantity and associated QC reports.
Quotations and Ordering:
 For quotations, please use our Secure Instant Online Quotation/Order system. However, you may also contact us by email, phone (1-732-885-9188), fax (1-732-210-0262), or via our Secure Messaging System.
Please use our online ordering system and either a PO (Purchase Order) or credit card to receive GenScript's fastest service. For batch order, please download and complete Standard Peptide Batch Order Form and email it to peptide@genscript.com. Our customer service representatives are available 24 hours, Monday through Friday to assist you.
We accept POs and major credit cards ( ). A 7% New Jersey sales tax will be applied to orders shipped to New Jersey. Your credit card will be billed under "GenScript USA Inc." Click here to download our credit reference form. For international orders, we must apply the full charge at the time the order is placed. In the unlikely event that any given order cannot be filled, our guarantee will take the form of a full refund.
|
