Peptide purity levels matching your requirements
> 98% purity
Choose this ultra-high purity for your most sensitive and regulated applications where maximum peptide integrity is essential.
- Commercial supply of Active Pharmaceutical Ingredients (API)
- Clinical trials;
- SAR studies
- X-ray crystallography studies
90 ~ 95% Purity
Ideal for biological experiments requiring high accuracy and minimal impurities.
- In vivo studies
- In vitro bioassays
- Reference for quantitative ELISA and RIA protocols Quantitative enzyme-substrate / receptor-ligand studies
- Blocking and competition assays
- Other quantitative assays NMR studies Mass spectrometry
~ 80% Purity
Well-suited for general research applications where ultra-high purity is not critical.
- Non-quantitative enzyme-substrate studies
- Non-quantitative peptide blocking studies
- Phosphorylation studies
- Western blotting studies
- Protein electrophoresis
- Coupling of resins for affinity purification
- Coating of tissue culture plates for cell attachment
~ 70% Purity
Recommended for immunological applications and antibody production where functionality outweighs purity.
- Determination of the titer of antibodies in standard ELISAAntigen for antibody production
- ELISA standard for measuring titers of antibodies in antisera
- Competitive elution chromatography Peptide array production
Available Peptide salt Counterions
Final isolation of the peptide is typically achieved by lyophilization. Space Peptides provide the options of various lyophilized salt forms (e.g., trifluoroacetate, acetate, chloride), depending on your experimental needs. In general, peptides are isolated to a lyophilized trifluoroacetate salt form, and further salt conversions can be performed for other salt form options. Alternatively, peptides can be isolated via precipitation, crystallization, and spray drying.
dispensing / aliquoting services
Space Peptides dispenses / aliquots your peptide orders into smaller quantities, according to your specifications. This will allow your peptides to enjoy greater stability in the long run by preventing contamination from frequently opening the container. Repeated thawing/freezing and opening/closing of the container will invariably introduce moisture into the samples. This could lead to bacterial degradation, peptide oxidation, and aggregation, lowering the purity of your peptide and causing loss of repeatability / continuity in future experiments. Weights for aliquots 1 mg and over will be determined by our balance scale. All aliquots less than 1 mg will be aliquoted volumetrically for more precision than our balance offers.
From Lab to You
Reliable Express Shipment & Delivery
Your peptides are produced, shipped, and delivered with speed and precision. From order to arrival, we ensure everything is in place for seamless use the moment it hits your lab.
Lead Time for peptide Custom Synthesis
Space Peptides typically takes 2-3 weeks to synthesize custom peptides, though the time period may vary depending on the two most determinate factors of sequence length and purity required. Commonly used Catalog peptides are readily available in-stock.
Shipment of peptides
Your peptides are shipped by FedEx service. On the day of the shipment, an e-mail is sent to the end-user confirming the shipment and providing a FedEx number in order to track the package if needed. Depending on the peptides, we either ship the peptides via cold chain or at ambient temperature and accompanied with desiccant to absorb excess moisture. Upon receipt of the product by the end user, it should be stored immediately at -20°C or lower.
handling & storage of peptides upon delivery
Your peptides are shipped by FedEx service. On the day of the shipment, an e-mail is sent to the end-user confirming the shipment and providing a FedEx number in order to track the package if needed. Depending on the peptides, we either ship the peptides at ambient temperature or via cold chain, accompanied with desiccant to absorb excess moisture. Upon receipt of the product by the end user, it should be stored immediately at -20°C or lower.
Before use, it is important to allow the peptide to warm to room temperature prior to opening the container. Warming in a desiccator or dry box is the best way to avoid water condensation forming on the peptide. Weigh out the product quickly in a clean environment at only the needed quantity to be used to minimize contamination and reseal containers tightly. Store all unused peptide at -20°C or less in a sealed container with desiccant. Storage under these conditions will reduce and prevent secondary structure formation, oxidative or microbial degradation for up to several years. Sequences containing cysteine, methionine, tryptophan, asparagine, glutamine, and N-terminal glutamic acid will have a shorter shelf life than other peptides.
When solubilizing the peptide, please use the recommended solvents outlined in the solubility test provided by Space Peptides. Sonication is often helpful to dissolve the peptide. In general, sterilized water is the preferred solvent, but acidic peptides will dissolve in a basic buffer and basic peptides in an acidic buffer as determined by the amino acid sequence of the peptide. Peptide sequences containing Cys, Met, and Trp require oxygen-free solvents as they are especially prone to oxidation. Peptides in solution are much less stable than the dried material and will remain stable for a much shorter period of time. As such, it is not recommended to store peptides under these conditions, but if unavoidable, the peptides in solution should be kept at -20°C using sterile buffers at pH 5-6 to prolong shelf life. The best way to circumvent shelf life limitations associated with peptide solutions is to have the peptides dispensed / aliquoted into smaller quantities by Space Peptides upon placement of the order.