Custom Peptides
Custom Peptides
TAG Copenhagen specializes in the synthesis of high-quality custom peptides tailored to meet the diverse needs of researchers. Purified using advanced Reversed Phase HPLC (RP-HPLC) techniques, our peptides are available in a wide range of purity levels and can be customized with various modifications, including biotinylation, phosphorylation, dye labeling, disulfide bonds, and more.
Whether you need simple or complex sequences, short or extended peptides, or special amino acid incorporations, our team ensures precise synthesis to match your exact specifications.
We manufactures peptides tailored to your individual peptide specifications.
Purification method
Our custom peptide are purified with a Reversed Phase HPLC
(RP-HPLC).
Purity Grades
75%, >85%, >90%, >95%, >98% and >99%
Full custom modification support
Our peptides supports a full range of custom modifications such as simple and complex peptides, short and long peptides, normal and special amino acids, biotinylation, phosphorylation, dye labelling, disulfide bonds, etc.
Length of residue
Our custom peptides are typically 6–30 amino acids long, but we can produce shorter or longer sequences, up to 60 residues, based on customer specifications.


Yields
Our production scale of custom peptide is from milligram to multi-gram quantities.
Content
The percentage of the total peptide present in the product is approx. 65%. In addition to TFA, the rest is water and other salts.
Delivery form
Custom peptides are standard delivered as trifluoroacetate salt, but acetate or chloride salts on request. Custom peptides are delivered lyophilized. Poorly soluble custom peptides are specially marked.
Certificate of Analysis
Certificate of Analysis (CoA) follows all custom peptides, incl. HLPC and MassSpec analyses.
Delivery
Fast and compitent world wide deliverey with our parterns
Delivery of peptides is 3-5 weeks.

Storage & Handling Guidelines
- The peptides are supplied lyophilized and should be handled with the following considerations:
- The peptides should be preserved at a cool dry, evades light place, seal.
- Short term storage 10-14 days of lyophilized peptide can be stored in a refridgerator. For longer storage (2-3 months), we recommend storing the peptide in a freezer at -20 C. For storage above 6 months we recommend storing in a deep freezer at -80 C if available.
- If peptide samples need to be frequently or periodically taken from the stock, it is recommended to make a series of aliquots from the stock.
- Peptide sequences containing C, M, or W are prone to air oxidation. It is recommended to purge the air out of the vial and replace it with a blanket of nitrogen or argon.
Finding the Right Solvent
The steps outlined below provides you with a method for determining the best solvent for a synthetic peptide based on its amino acid sequence. It is best to first solubilize a small aliquot of the sample, rather than the entire sample. Assign a value of -1 to each acidic residue. The acidic residues are Asp (D), Glu (E), and the C-terminal -COOH. Assign a value of +1 to each basic residue. The basic residues are Arg (R), Lys (K), His (H), and the N-terminal -NH2. Calculate the overall charge of the peptide. If the overall charge of the peptide is a positive value, you have a basic peptide. Initially try to dissolve the peptide in water.
If the peptide does not dissolve, try 10% and higher solutions of acetic acid. If the peptide still does not dissolve, add TFA (<50ul) to solubilize the peptide and dilute to 1ml with deionized water.
If the overall charge of the peptide is a negative value, you have an acidic peptide. Initially try to dissolve the peptide in water. If the peptide does not dissolve, add NH4OH (<50ul) and dilute to 1ml with deionized water. If the overall charge of the peptide is zero, your peptide is considered neutral. Neutral peptides may require the addition of organic solvents, such as acetonitrile, methanol, or isopropanol. The addition of denaturants, such as urea or guanidinium-HCL may also be required.
How to Order
Please contact our customer service for any questions when ordering Custom Peptides
You can also contact us directly via email or phone for personalized support.
Order Online
Place your orders quickly and conveniently through our online order portal. Simply log in, upload your specifications, and track your order status—all in one streamlined platform.
Order by E-mail
Please send an e-mail to peptide@tagc.com and use our template by downloading it below:
If you do not wish to use our template, please add the following to your e-mail:
- Name
- Address
- Phone number
- Name of your institution
- Payment information
- Peptides (one peptide per line)
- Quantity
- Sequence
- Purity
Please note: all peptides listed in this website are for research or production use only, not for direct human use.