Alexa Fluor Dye-labeled Peptide Synthesis Service

Thermo Scientific Custom Peptide Synthesis Service offers dye-labeled peptide synthesis for a broad range of dyes, featuring our highly cited, high performance Alexa Fluor dyes to meet a variety of research needs. Peptides between 6 and 70 amino acids in length are synthesized and labeled using the latest FMOC solid-phase technology and purified using HPLC. A range of peptide synthesis scales (1 mg–10 mg) and purity (crude to 98%) are available.

  • High performing dyes–Alexa Fluor dye conjugates exhibit more intense fluorescence compared to other spectrally similar conjugates.
  • Versatility–broad selection of dyes and other modifications for detection available
  • Validation–all peptides are analyzed by MALDI MS alone or combined with analytical HPLC
  • Economical–conjugation services with Alexa Fluor dyes are cost effective compared to other suppliers

Contact us using these email addresses, or download and send the quote request form.
Europe, Middle East, and Africa: europeservicespeptides@thermofisher.com
Rest of World (incl. N. America): peps@thermofisher.com


Applications for fluorescent peptides

  • Flow cytometry
  • In-vivo imaging
  • Enzyme activity detection
  • Fluorescence microscopy
  • Fluorescent assay development

Alexa Fluor conjugates exhibit more intense fluorescence than other spectrally similar conjugates.

Specifications of the Thermo Scientific Alexa Fluor-labeled Peptide Synthesis Service

Peptide length 6 to 70 amino acids
Peptide manufacturing scale 1 to 10 mg
Peptide purity options Crude - 98% pure
Peptide quality control (QC) MALDI MS and analytical HPLC
Peptide conjugation site (reactive group)  and conditions
  • C-term conjugation to carboxyl groups (-COOH). The side chains of Asp and Glu will (partly) react as well
  • N-term conjugation to amino groups (-NH2). The side chains of Lys will react as well
  • Conjugation to the thiol group (-SH) of Cys In this case all Cys in the sequence will react
Conjugate delivery options ≥10 business days, depending on scale and purity

† Please inquire about shorter or longer peptide lengths;
‡ Greater amounts or different scales available upon request