Protein Conjugation Services

Protein Conjugation Services

In the rapidly advancing field of biomedicine, protein conjugation has emerged as a vital technique for enhancing the functionality and applicability of proteins in various applications. At BOC Sciences, we specialize in providing diverse protein conjugation services aimed at optimizing protein performance for research, diagnostics, and therapeutic purposes.

What is conjugating a protein?

Protein conjugation is a biological technique involved in the formation of hybrid molecules by combining two or more proteins or a protein with small molecule entities. Through specific chemical reactions, a covalent bond is created between the molecules, which enables the production of protein conjugates.

These protein conjugates are typically synthesized by attaching a protein of interest to another substance such as another protein, peptide, antibody, or small molecule. The extra moiety can be a fluorophore or an enzyme reporter, aiding in the detection and study of the target protein.

What is the process of conjugating?

The process of protein conjugation typically involves several key steps:

  1. Selection of protein and molecule: Identifying the protein of interest and the molecule to be conjugated (e.g., fluorophores, drugs, peptides, polymers).
  2. Chemical modification: Performing chemical reactions to covalently link the molecule to specific sites on the protein (e.g., amine groups on lysine residues, cysteine residues).
  3. Purification and characterization: Purifying the conjugated protein to remove unreacted molecules and confirming the successful conjugation through analytical techniques (e.g., mass spectrometry, SDS-PAGE).
  4. Quality control: Assessing the stability, activity, and functionality of the conjugated protein to ensure suitability for the intended application.

Our state-of-the-art facilities embrace this complex process, offering specific and efficient protein conjugation services personalized to your requirements.

Common approaches to protein conjugation

Bioconjugation via amine coupling: Utilizing reactive amine groups (-NH2) on proteins for conjugation with activated carboxylic acids or esters. This method is versatile and widely used for linking proteins with dyes, drugs, or polymers.

Thiol-maleimide conjugation: Exploiting the highly selective reaction between thiol (-SH) groups on proteins and maleimide functional groups. This method is ideal for site-specific conjugation, ensuring controlled attachment of payloads.

Click chemistry: Harnessing bioorthogonal reactions like azide-alkyne cycloaddition to achieve selective and rapid protein conjugation under mild conditions. Click chemistry facilitates precise modification of proteins without altering their native structure.

Genetic fusion: Incorporates genetic engineering techniques to express a fusion protein where the protein of interest is directly linked to a tag or another protein, simplifying the conjugation process.

What is the function of a conjugated protein?

The significance of conjugated proteins is versatile and encompasses various applications in biological and clinical research. Conjugated proteins provide a greater advantage over unconjugated systems due to their enhanced specificity, sensitivity, stability, and function.

Enhanced therapeutic efficacy: Conjugating a protein with a drug can improve its delivery to target tissues or cells, enhancing therapeutic outcomes while minimizing side effects.

Improved detection and imaging: Fluorescent or radioactive tags conjugated to proteins enable sensitive detection and visualization in biological samples, aiding in diagnostics and research.

Targeted delivery systems: By conjugating proteins with targeting ligands, such as antibodies or peptides, precise delivery to specific cells or tissues can be achieved, improving efficacy and reducing off-target effects.

Protein engineering: Bioconjugation techniques are also employed in protein engineering to modify and study protein structure and function.

Biomaterial development: Incorporating proteins into polymers or nanoparticles via conjugation imparts unique properties to biomaterials. This is pivotal in tissue engineering, creating scaffolds that mimic native environments and promote tissue regeneration.

Our protein conjugation services

BOC Sciences offers a comprehensive suite of protein conjugation services tailored to meet diverse research and development needs:

Custom conjugation: Understanding that every protein conjugate has unique requirements based on its final application, we provide customized conjugation solutions. Whether you need assistance with the preparation of conjugation-ready proteins, method development, or conducting bioconjugation reactions, our experts will work with you to offer a tailored solution. The following are our existing protein conjugate services.

Wide molecule compatibility: Our expertise extends to a broad range of molecules, including small molecules, peptides, antibodies, and nanoparticles.

Quality control: Through rigorous quality control and in-process testing, we ensure the reproducibility and efficiency of our conjugates. Our dedicated analytical team ensures that the conjugates meet the highest of standards and requirements as per regulatory guidelines.

Why choose BOC Sciences?

Expertise: Our team comprises experienced scientists with expertise in protein biochemistry and conjugation techniques.

Customization: We prioritize customization, tailoring our services to meet individual project goals and specifications.

Quality assurance: Rigorous quality control ensures the delivery of high-quality conjugated proteins with reproducible results.

Timely delivery: We understand the importance of timelines and strive to deliver results efficiently.

Collaborative approach: We value collaboration and work closely with clients to optimize solutions and achieve desired outcomes.

Protein conjugation plays a pivotal role in advancing biomedical research and applications. At BOC Sciences, we are committed to empowering our clients with innovative conjugation solutions to accelerate scientific discoveries and therapeutic developments. Partner with us to unlock the full potential of conjugated proteins for your projects.


1. What types of protein conjugation services do you offer?

We offer a range of protein conjugation services including antibody-drug conjugation (ADC), protein-to-protein conjugation, protein-to-small molecule conjugation, peptide conjugation and protein labeling with various dyes or tags.

2. What are the advantages of using your protein conjugation services?

Our services ensure high conjugation efficiency, excellent stability of the conjugates, and minimal impact on protein function. We also provide customization options to meet specific project needs.

3. What types of labels or molecules can be conjugated to proteins?

We can conjugate proteins with a variety of labels including fluorescent dyes, biotin, enzymes, nanoparticles, and small molecules like drugs or linkers.

4. What is the typical turnaround time for protein conjugation projects?

Turnaround times vary based on project complexity and scale. Generally, we strive to deliver results within 2-4 weeks for standard projects. Expedited services are available upon request.

5. Can you conjugate proteins of different sizes and structures?

Yes, we can conjugate proteins of various sizes and structures. Our team will evaluate the feasibility of each project based on specific requirements.

6. How do you ensure the quality and consistency of the conjugation process?

We employ rigorous quality control measures throughout the conjugation process, including validation of starting materials, optimization of reaction conditions, and comprehensive analytical testing of the final conjugates.

7. Do you offer custom conjugation services for specific research needs?

Absolutely! We specialize in tailoring our conjugation services to meet individual research needs. Please contact us to discuss your project requirements.

8. What analytical techniques do you use to characterize protein conjugates?

We utilize a range of analytical methods such as SDS-PAGE, HPLC, mass spectrometry, and bioactivity assays to thoroughly characterize our protein conjugates.

9. Can you work with sensitive or delicate proteins?

Yes, our conjugation protocols are optimized to minimize denaturation or damage to proteins, allowing us to work with a wide range of proteins, including sensitive or delicate ones.

10. Can you scale up production for large quantities of conjugates?

Yes, we can scale up production according to your needs. Please provide details of your volume requirements for a tailored solution. How can I get started with a protein conjugation project?

* Please kindly note that our services can only be used to support research purposes (Not for clinical use).
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