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KJ Ross-Petersen ApS
Custom Peptides


Custom Peptide Synthesis

Through the years peptides have been offered in co-operation with the TAG Copenhagen sister company, KJ Ross-Petersen ApS. Since the mid-nineties we have together delivered more than 6000 different peptides for pharmaceutical companies, universities and institutions in Scandinavia, UK, Germany and France.

TAG Copenhagen has carefully selected the ISO9001:2000 certified collaborator performing the synthesis of the peptides – a company with many years of experience with organic chemistry and currently employs >250 chemist in the Production, QC/QA and R&D departments.
The peptides are synthesized on state-of-the-art instruments and the staff consists of experienced organic chemists. Every peptide is delivered lyophilized with a Certificate of Analysis with HPLC and MassSpec analyses.
On the Price List we have included some of the most common purity grades and modifications available. However, TAG Copenhagen offers many more purity grades and modifications than listed in the prices lists. Please contact us if you have special inquiries. The purity grades, modifications and services we can provide include:
Purity grades: Crude, desalted, >75%, >85%, >90%, >95%, >98% and even above 99%
Production scale: Milligram to multi-gram quantities
Peptide & Modifications: simple and complex peptides, short and long peptides, normal and special amino acids, biotinylation, phosphorylation, dye labelling, Peptide - Protein bio-conjugation, etc., etc.
Full confidentiality

How to order
Please send a mail to - or contact TAG Copenhagen A/S, tel +45 39179707, mail

KJ Ross-Petersen ApS   -    Tlf: (+45) 20193646   -   E-mail: