Need a very long peptide? Synpeptide Co Ltd has a track record for synthesizing biologically active long peptides (> 150 amino acids in length) with the purity and speed previously only possible with shorter peptides. Producing these long peptides was previously performed using recombinant DNA methods. However, due to likelihood of endotoxin contamination, these methods can be problematic. Chemical peptide synthesis offers lower toxicity in downstream applications. Custom long peptide synthesis is carried out using optimal ligation and fragment condensation methods.

All Synpeptide's specialty peptides are provided in the highest purity (>95%), with a full range of analyses including LC-MS (trap and/or quad), MALDI-MS, HPLC, AAA, NMR, CE, as well as peptide content determination to confirm the identity and demonstrate the high quality of our custom long peptides.

We have successfully synthesized green fluorescent protein (GFP) with 238 amino acids. [Proc. Natl. Acad. Sci. U.S.A., 95, 13549 (1998).]

Chemical synthesis of the long peptides and proteins with high purity by solution/solid phase synthesis, Boc/Bzl or Fmoc/tBu chemistry.

Advantage: site specific modification of your molecule. (fluorescence-labeling, stable isotope-labeling, glycosylation, phosphorylation, etc.)

GFP 238AA

Midkine (Human) 121AA 5SS

FRETS-VWF73 73AA

Ordering & Contact Information

Please contact us for additional information or send an email to peptide@synpeptide.com

You may also request an online quote.