A Reliable supplier of high-quality synthetic peptide
Chengdu Youngshe Chemical Co.,Ltd is dedicated to provide highest quality peptides for university, institute, biotech company and pharmaceutical plant in the world. At the moment, the company has five production branches globally with total of 350 plus chemists directly involved in peptide synthesis, and additional 250 plus technicians in HPLC purification.


In addition to having well established manual synthesis techniques, Youngshe chem also invests in units of Automated Multiple Peptide Synthesizers to support customers in peptidomimetics studies and drug discovery for milligram scale of a large number of related peptides and peptidomimetics. 


We have also developed different solution phase synthesis methodologies to meet customers' requirements for peptides in commercial scale.Our monthly capacity reaches >10,000 purified custom peptides. Global market share has been over 60%. It possesses the biggest capacity with state-of-the art facilities in custom peptide in the world.


We Offer:
High quality peptides made by experts & delivered to you with all documents:

  • HPLC chromatogram
  • Mass spec analysis
  • Synthesis report


Range of Services:
Our staffs are experienced in the synthesis of high quality peptides with various modifications. With over 200 units of analytical and preparative HPLC, we can provide peptides from small scale (mgs) to large scale (kgs) in very fast delivery:

  • Simple to complex and Linear to cyclized
  • Long sequences peptide up to 140 mer
  • From small to large scale
  • Different purity level (desalted, >75%, >85%, >90%, >95%, >98% and even above 99%)
  • Widest variety of modifications (from biotinylation to phosphorylation, to dye labeling, and much more…)
  • Peptides - Protein Bioconjugation
  • Purification at different scales
  • Highest success rate in the industry


List of Modification

N,C-terminal  Modification

Special Amino acid

Fluorescence/Dye labeling

Cyclic Peptide

Quenched Fluorescent Peptide

Multiple Antigenic Peptide System

Protein Conjugation

Acetylation (N-Terminal),

HYNIC (N-Terminal),

DTPA (N-Terminal),

Formylation (N-Terminal)

Fatty acid (N-Terminal)

Myristic acid (N-Terminal)

Palmytolyl (N-Terminal)

Benzyloxycarbonylation  (CBZ)

Amidation (C-Terminal)

Succinylation (Suc, N-Terminal)



D-Arg, D-Cys, D-Asp, D-Asn, D-Glu, D-Gln, D-Ser, D-His, D-Thr, D-Trp, D-Leu,D-Ile, D-Met, D-Pro, D-Val ,D-Phe, pGlu, Hyp, D-Lys,D-Tyr, D-Orn, Orn, Abu, Aib, (D)1-Nal, (D)2-Pal, (D)4-Cl-Phe, Nva, Nle, Hse, Hcy, Pen, Mpa,N-Methyl amino acid (Ala, Phe, Leu, Ile, Val, Gly, Met),Other amino acid, Dinitrobenzoylation (Lys), Lys(Me2), Phosphorylation (Tyr, Ser, Thr, single site), Tyr(SO3H2), Ser(octanoic acid)



Biotin (N-Terminal, Y/N Ahx),

Biotin (Lys in sequence)

Biotin (without Lys in sequence)

FITC/5-FAM (N-Terminal, Y/N Ahx)

Dansyl (N-Terminal, Y/N Ahx)

MCA (N-Terminal)

p-Nitroanilide(pNA, C-Terminal)

AMC (C-Terminal)

Disulfide bridge 1st

Disulfide bridge 2nd

Disulfide bridge 3rd

Amide cyclic (Side chain, end)

Abz/ Tyr (3-NO2),


Asymmetric 4 branches

Asymmetric 8 branches

Technical Support:Kuujiasoft