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Custom Amino Acids and Peptides

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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
Special
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
EDANS/DABCYL
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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    For inquiries or other issues, you may contact us by: Filling Out the Form or following ways:

    • Europe: +44 20 360 89 360 - 1
    • North and South America: +1 (909)345 0760 - 1
    • Asia, Africa and Australia: +852 5808 4975 - 1
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    As global energy exploration continues to advance into deeper, hotter, more saline, and higher-pressure formations, the performance requirements for oilfield cementing additives have become increasingly stringent. In particular, in challenging environments such as the Middle East, Central Asia, North America, and offshore oilfields, cementing additives with excellent fluid loss control, retardation, anti-settling, and environmental adaptability have become critical to ensuring wellbore integrity and enhancing operational efficiency. At the same time, the global trend toward environmentally sustainable operations has accelerated the demand for phosphate-free preflushes and low-toxicity defoamers in international markets.<br /><br />Against this backdrop, Polyberg leverages its deep expertise in polymer chemistry and engineering to deliver high-performance, tailor-made cementing additive solutions for the global energy industry. Its products are already in use across a wide range of internationally renowned oilfield projects. Designed to accommodate traditional land wells, shale gas wells, and demanding offshore and ultra-deepwater environments, Polyberg’s solutions have earned the long-term trust of clients in the Middle East, South America, Southeast Asia, Russia, and beyond. 3:23

    As global energy exploration continues to advance into deeper, hotter, more saline, and higher-pressure formations, the performance requirements for oilfield cementing additives have become increasingly stringent. In particular, in challenging environments such as the Middle East, Central Asia, North America, and offshore oilfields, cementing additives with excellent fluid loss control, retardation, anti-settling, and environmental adaptability have become critical to ensuring wellbore integrity and enhancing operational efficiency. At the same time, the global trend toward environmentally sustainable operations has accelerated the demand for phosphate-free preflushes and low-toxicity defoamers in international markets.

    Against this backdrop, Polyberg leverages its deep expertise in polymer chemistry and engineering to deliver high-performance, tailor-made cementing additive solutions for the global energy industry. Its products are already in use across a wide range of internationally renowned oilfield projects. Designed to accommodate traditional land wells, shale gas wells, and demanding offshore and ultra-deepwater environments, Polyberg’s solutions have earned the long-term trust of clients in the Middle East, South America, Southeast Asia, Russia, and beyond.

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    As a globally registered trademark of Watson, ChemWhat has established itself as a rising international leader in the field of ultra-high-purity inorganic reagents. Known for its unwavering commitment to quality, ChemWhat has become a trusted brand among researchers and industries worldwide. Its product line—spanning rare earth halides, other metal halides, and metal chalcogenides—has been widely adopted in cutting-edge applications such as scintillation crystals, optical fiber manufacturing, perovskite materials, and solid-state electrolytes, powering the next generation of technologies across a wide range of sectors.

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