Characterization of Protein Biosimilar

Biosimilar is a biomedical product produced by another company, which is almost the same duplicate of the original and created after the patent protection for original biopharmaceutical products expired. Its characteristic is very similar to the original drug in structure, quality, considerable bioactivities and bioequivalence. Biosimilars have become a global concern for a number of reasons. For example, safety, purity and efficacy of biosimilars offer similar benefits to reference biological products; drugs represented by monoclonal antibodies and recombinant protein drugs have developed rapidly in recent years; many original biopharmaceutical products have entered the intermediate stage, etc. Protein biosimilars are developed after the patent of biological drugs expires. The more patents expire, the more room for the development of protein biosimilars. So, it is necessary to understand protein biosimilars' structure and biological characteristics.

What Is Protein Biosimilar?

Protein biosimilar is a protein-based drug, which is one of the most important biosimilars. Protein biosimilars are also formed by transcription, translation and processing of genes, and have high molecular weight, complex three-dimensional structure, heterogeneity and biological activity, just like original protein drugs. The molecular mass is usually between 18,000 and 145,000. The active component of protein biosimilars is not a single molecule, but a collection of macromolecular protein isomers. Their heterogeneity is reflected in the fact that even under the same expression vector, technology and production process. The same protein biosimilars produced by different manufacturers are more or less different from each other. Biological activity is shown to have effects like original protein drugs, which plays a corresponding role in the body. But this is different from original protein drugs, because protein structures change easily, and even small changes can affect their activity. In addition, for bioequivalence, protein biosimilars are different from original biosimilars. Therefore, the analysis of biosimilars is important.

Characterization of Protein Biosimilar at Creative Proteomics

At Creative Proteomics, we provide information on protein biosimilars, including the structure of protein biosimilars, the physicochemical properties of protein biosimilars, the impurities associated with the production of protein biosimilars.

  • Structural Characterization
    Any drug has its unique structure that affects their function. So does protein biosimilar, which changes in an organism as its environment changes and then performs different functions. To study a protein biosimilar, it is fundamental to understand the structure of the drug in different environments.
  • Physicochemical Properties
    Each drug plays a role in the organism, which is related to its own physical and chemical properties, and only when the environment matches its physical and chemical properties, can it play the best role. The physicochemical properties of protein biosimilars include PH, isoelectric point, solubility and so on.
  • Process- & Product-related Impurities
    Proteins are formed by transcription, translation and processing of genes. Although these processes are strictly regulated, non-target proteins, which are related to the drug, can still be produced due to changes in the environment or other factors. These impurities may be misfolded proteins, precursors to target proteins or unmodified proteins, etc.

Our Advantages

  • We can help you understand the basic information of your target biosimilar to help you optimize research conditions and save time.
  • With a professional platform, we can help you study various protein biosimilars, such as valsartan tablets and albumin paclitaxel.

Our company has a team with high professional quality and strong information search ability. Creative Proteomics will update the information system to provide you with the content you need in time. Our ordering procedure is as follows. If you have any questions or specific requirements, please feel free to contact us.


  • Capgemini Consulting. Origins and future of the biosimilars industry. DVFA Life Science Conference. Frankfurt, 2010-06-08.
  • Crommelin DJ, Bermejo T; et al. Pharmaceutical evaluation of biosimilars:important differences from generic low-Molecular weight pharm.Eur J Hosp Pharm Sci, 2005,11(1):11-17.

*For Research Use Only. Not for use in the treatment or diagnosis of disease.

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