• D&B Number: 68-718-2908
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Custom Amino Acids with High Requirement on Impurities

Apnoke Scientific Ltd develops natural amino acids, unnatural amino acids, amino alcohols, N-Methyl amino acids, phosphorylated amino acids especially the ones with high requirement on impurities for pharmaceutical uses. Specialty, High grade, Reasonable price and In time are our four advantages in amino acid field…

Our advantages

  • Specialty. Rich experience in synthesis and resolution of amino acids;
  • High grade. Effect quality control by NMR、HPLC、EE.、Optical Rotation etc;
  • Reasonable price. Mature product line with the industrialization of the production process allows us to control costs effectively and offer you the best price;
  • In time. Different levels of intermediate inventory enable us to meet your needs quickly.

We will be committed to the amino acids in the development and production, process improvement and optimization. And constantly improve the variety of amino acids and inventory. Establish an “Amino Acid Libraries”.

Custom Peptides

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
Amino acid
Fluorescence/Dye labeling
Cyclic Peptide
Quenched Fluorescent Peptide
Multiple Antigenic Peptide System
Acetylation (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),
Disulfide bridge 1st
Abz/ Tyr (3-NO2),
Asymmetric 4 branches
HYNIC (N-Terminal),
Biotin (Lys in sequence)
Disulfide bridge 2nd
Asymmetric 8 branches
DTPA (N-Terminal),
Biotin (without Lys in sequence)
Disulfide bridge 3rd
Formylation (N-Terminal)
FITC/5-FAM (N-Terminal, Y/N Ahx)
Amide cyclic (Side chain, end)
Fatty acid (N-Terminal)
Dansyl (N-Terminal, Y/N Ahx)
Myristic acid (N-Terminal)
MCA (N-Terminal)
Palmytolyl (N-Terminal)
p-Nitroanilide(pNA, C-Terminal)
Benzyloxycarbonylation (CBZ)
AMC (C-Terminal)
Amidation (C-Terminal)
Succinylation (Suc, N-Terminal)

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