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Phone : 1-302-525-4060
1-302-407-6891 Email : Fax : 1-888-683-0988

At Affinity Research Chemicals, we are not trying to provide the most comprehensive range of peptide modifications (though we are capable of doing that). We want to focus on the modifications that we can definitely do better than our competitors.


Incorporation of unnatural acids into peptides - we have a large selection of unnatural amino acids (>800) to choose from.


Incorporation of stable isotope-labeled amino acids into peptide.


Modification of N-terminus, C-terminus and side chains by small organic molecules and their isotopic analogs.


Please send us your request, we will provide a quote within two business days.