Custom Peptide Synthesis Services
Custom Peptide Synthesis Services
1. Please click here to receive a custom peptide synthesis service quote now!
2. If you have a quote number already, please click here to place a peptide synthesis service order now!
LifeTein®, the custom peptide synthesis service company, has developed proprietary PeptideSynTM technology. This technology provides a platform for continuous peptide synthesis using Fmoc and Boc chemistry and a proprietary solid support resin. This is one of the many reasons why LifeTein® can offer competitive custom peptide synthesis prices.
LifeTein routinely uses our proprietary technologies to produce peptides >100 amino acids. The longest peptide we have made to date is 169 amino acids. You will not be charged if we are unable to synthesize your peptide successfully. We promise to provide the HPLC purified peptide with correct molecular weight analyzed by Electrospray ionization (ESI) Mass Spectrometry. The Net Peptide Content is not tested or guaranteed.
Features and Benefits
- FREE aliquoting is available. Why aliquot?
- TFA removal service. Why remove TFA?
- Free peptide online analysis tool: Analyze my peptides
- Peptide quantities from mg to kg
- Sequence lengths of 5-120 amino acids
- Peptide purity levels including crude, desalted, >75%, >85%, >95%, 98%, and greater than >99%
- Comprehensive range of peptide modifications:KLH, CPP tag, Oligonucleotide, Magnetic Agarose, and biotin. Click here to see the full list of modifications
- Fast turnaround: most peptides synthesized can be delivered within 2-3 weeks
- Peptide library service options
- Stringent analytical specifications including free HPLC and MS analyses
- Peptides are sealed to prevent oxidation. Why seal peptides?
- D amino acid peptides can be synthesized to resist common proteases.
- Choose high-quality peptides: Get published in Nature.
- Large capacity: We have the capacity to produce 5,000 purified peptides per month, ranging from crude to highly pure and complex peptides.
- Guaranteed quality: Peptide synthesis projects are carried out by using Fmoc and Boc chemistry under strict quality control based on HPLC and by mass spectrometry. 95% of all projects are finalized in 2-3 weeks to guarantee on-time delivery.
- Data protection: All sequences supplied to LifeTein® are considered to be the confidential property of the customer. LifeTein® hereby disclaims any rights whatsoever to any intellectual property or information provided by the customer, including materials or any peptide sequences. At the completion of the project, all synthetic peptides that meet the purity criteria will be sent to the customer.
Try our custom peptide synthesis service and read what our customers have to say:
Frequently Asked Questions: Peptide Synthesis
Please click here to see answers to FAQs
- How should I store and handle the synthesized peptides?
- How should I dissolve peptides?
- Can I predict whether a peptide will be soluble?
- How do I select the best peptide purity for my research?
- What is peptide purity?
- What is net peptide content?
- What salt form should I use?
- How are peptides synthesized?
- What are your QC standards for peptide synthesis?
- Can you aliquot my peptides?
- What are APIs, catalog peptides and custom peptide synthesis?
- What is the minimum quantity for one order?
- What is the maximum peptide length that LifeTein® can produce?
- What is solid-phase synthesis?
- What are resins and linkers?
- What is a protecting group?
- What are acetylation and amidation?
- Is a spacer required for fluorescent modification?
- How do I calculate the peptide concentration?
- How do I detect small peptides using SDS-PAGE?
Cell-penetrating Peptide Synthesis
The process of introducing drugs into cells has always proved to be a major challenge for scientists. However, cell-penetrating peptides (CPPs) have the ability to enter a cell through the plasma membrane independent of a membrane receptor. They are usually small peptides 10–30 residues in length.
Cell Penetrating Peptide Oligonucleotide Conjugate
Click here or picture below for details.
The following table shows a selection of currently known CPPs, together with their origins and sequences. Click here for more details.
Name |
Sequence |
HIV-1 protein |
GRKKRRQRRRPPQQ |
Antermapedia homeodomain |
RQIKIWFQNRRMKWKK |
Galanin-mastoparan peptide |
GWTLNSAGYLLGKINLKALAALAKKIL |
SV40 |
GALFLAFLAAALSLMGLWSQPKKKRRV |
Stearyl-R8 |
Stearly-RRRRRRRR-amide |
Peptide Synthesis Case Studies
Incomplete deprotection and amino acid-coupling reactions can complicate certain processes. Longer reaction times and the use of increased strength reagent could solve this problem. However, in some extreme cases, these methods are insufficient and the protecting group cannot be removed efficiently. In addition, the side chains of some sequences render them prone to self-association by hydrogen bonding. This leads to aggregation and the formation of beta-sheet-like secondary structures that can halt peptide synthesis.
LifeTein's optimized protocol and PeptideSyn technology provide a method for circumventing the problems associated with difficult sequences. This technology can change peptide structure by protecting some of the peptide amide bonds, giving rise to peptides that contain tertiary amides at specific intervals. This leads to better preservation of the peptide chain, and more efficient deprotection and coupling reactions.
Case 1: Solid-phase synthesis of a peptide with four phosphorylation sites.
A 14 amino acid peptide (molecular weight: 1981.53) with four phosphorylation sites was synthesized at 95% purity and delivered in 3 weeks: xxxpSpTxxxpSxxxpTx
HPLC Results:
MS Results:
Case 2: Long peptide synthesis is always difficult and challenging. Recently, a 169-amino-acid peptide was successfully synthesized in 4 weeks. The following case is a very hydrophobic 68 amino acid peptide (85% purity) with a FITC modification at the N terminus. The peptide was successfully synthesized in 4 weeks.
HPLC Results:
MS Results:
How to estimate prices and place orders for custom peptide synthesis:
Please fax our order form to 1-888-791-1618 or email us at peptide@lifetein.com.
1. You can use the following table to estimate peptide synthesis price. Please inquire for more pricing information:
(Prices are per amino acid, and are valid for peptides up to 30 residues. Get a quote for peptides sized 30 to 200 residues. )
| Quantity | Purity | ||
| Crude | >85% (Get a quote for desalted, 70%, 75%, 80% and other purities) | >95% (Get a quote for >98%, 99% and other purities) | |
1-4 mg (Get a quote for 5-9mg, 10-14mg and other quantities ) |
$3.20 | $9.00 | $11.56 |
| 15-20 mg | $4.76 | $15.30 | $20.40 |
| 40-50 mg | $6.46 | $19.89 | $27.20 |
| 70-80 mg | $7.82 | $26.69 | $35.70 |
| 1000 mg | $28.05 | $79.90 | $105.40 |
Click here to see the list of available peptide modifications
- Our standard peptide synthesis package includes a certificate of analysis, and HPLC and MS reports.
- Amino Acid Analysis and N Elemental Analysis are available at competitive prices.
- Free peptide aliquoting services are available.
- Solubility tests are available.
- TFA removal service is available.
- Discounts are offered for large orders.
- The turnaround time for regular peptide synthesis services is 2-3 weeks.
- Shipping price: $25.00 (U.S.), $30.00 (Canada), $45.00 (International).
2. Quotations
- Method 1: Obtain a quote using the online quotation form:
- Method 2: Please complete the Quotation Form for the peptide(s) you would like to purchase and either fax it to 1-888-791-1618 or email it to peptide@lifetein.com. We will send you a formal quote within 24 hours.
3. Placing an order
- Method 1: Place your order online if you already have a quote number:
- Method 2: Please sign the quote form we send you, and either fax it to 1-888-791-1618 or email it with your Purchase Order, if applicable, to peptide@lifetein.com. We will confirm your order within 24 hours.
4. Or Just Ask Me