Custom Recombinant Antibodies and Proteins

Our Custom Solutions team is committed to facilitating your research. We offer custom recombinant antibodies and proteins at the highest possible standard. 


We provide an extensive selection of custom recombinant antibodies for all aspects of your research. In addition, we offer bioactive recombinant proteins, including cytokines, growth factors, chemokines, and enzymes. Products are manufactured and quality tested in our facility for bioactivity. Customize your recombinant reagents or order in bulk.


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Custom Recombinant Antibodies


Features of our recombinant antibodies include:


  • Reduced immunogenicity through species and isotype switching
  • Smaller size when produced as antibody fragments, which influences antigen binding or tissue penetration
  • Antigen crosslinking with bispecific recombinant antibodies.



Schematic illustrating available custom recombinant antibody features. Fv: fragment variable, Fab: fragment antigen binding, Fc: fragment crystallizable, scFv: single chain fragment variable and scFv-Fc: single chain fragment variable fragment constant.


We provide the following recombinant antibody services:


  • Species and isotype switching of full length antibodies:
    • Human IgG1, IgG2, IgG3, IgG4; Mouse IgG1, IgG2a, IgG3; Rat IgG1, IgG2a, IgG2b, IgG2c; and Rabbit IgG
  • Development of partial length antibodies:
    • scFv, Fab, F(ab)2, bispecific


Custom Recombinant Proteins

Our custom recombinant proteins include cytokines, growth factors, chemokines, and enzymes and are validated in-house to ensure reproducibility and biological activity.  


We provide the following custom recombinant protein services (from gene to protein):


  • Clone the target of interest into different expression vectors
  • Expression of protein of interest in bacteria, insect, or mammalian expression systems
  • Purification and/or endotoxin removal
  • Both in vivo and in vitro functional assay applications
  • Carrier-free or animal-free formats for functional assays or to avoid experimental variability

Competitor and Internal Control Testing


We internally compare new lots with previous lots for consistency. In addition, we also test our products against ones available from the competition. This ensures you can have full confidence when using our recombinant proteins.



Competitor and Internal Control Testing

Quality Testing


Our products undergo extensive quality testing to ensure activity and lot-to-lot consistency. Our testing includes protein content, purity and parameter confirmation using SDS-PAGE, HPLC, UV Spectroscopy and Mass Spec analyses. Protein solutions are also 0.2 μm-filtered prior to bottling by membrane filtration method to prevent microbial contamination.



Stability Testing


Our recombinants are stability tested at different temperatures and time intervals to determine the optimal storage, handling, and shipping conditions. Our testing shows that most recombinant proteins are able to withstand room temperature (RT) and 37°C for a week without losing activity. In addition, most of our recombinant proteins are also able to withstand four cycles of freeze and thaw without losing activity.



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