High-Affinity DARPin & Ankyrin Binder Selection by Ribosome Display
Rapid Discovery of High-Affinity Engineered Binding Proteins
Rx Biosciences offers ribosome display services for the discovery and optimization of Designed Ankyrin Repeat Proteins (DARPins) and other ankyrin repeat-based binding proteins. This fully cell-free technology enables the screening of ultra-large libraries to rapidly identify binders with exceptional affinity, specificity, and stability for research, diagnostic, and therapeutic applications.
At a Glance
Cell-Free Ribosome Display
No transformation required
Ultra-Large Library Diversity
10¹²–10¹⁴ unique variants
Rapid & Iterative Selection
Efficient affinity maturation
Broad Protein Formats
DARPins, ankyrins, peptides and more
High-Performance Binders
Exception affinity, specificity and stability
Cell-Free Ribosome Display
No transformation required
Ultra-Large Library Diversity
10¹²–10¹⁴ unique variants
Rapid & Iterative Selection
Efficient affinity maturation
Broad Protein Formats
DARPins, ankyrins, peptides and more
High-Performance Binders
Exception affinity, specificity and stability
Ready-to-Go Display Libraries
Accelerate your antibody and DARPin discovery with Rx Biosciences' ready-to-screen, high-diversity display libraries. Our validated libraries eliminate the time and cost of library construction, enabling rapid identification of high-affinity binders for research, diagnostics, and therapeutic development.
Available Libraries
Human Naïve scFv Ribosome Display Library
(Complexity >1 × 10¹⁴)
DARPins Ribosome Display Library
(Complexity >1 × 10¹⁰)
OUR RIBOSOME DISPLAY WORKFLOW
Library Design & Construction
Custom or synthetic DARPin and ankyrin repeat libraries.
In Vitro Transcription & Translation
Generation of protein–ribosome–mRNA complexes under cell-free conditions
Target Selection
Iterative rounds of selection against client-supplied targets with increasing stringency
Sequence Recovery
RT-PCR amplification of selected mRNA, DNA sequencing and bioinformatic analysis
Expression & Characterization
Recombinant protein expression, Affinity and specificity testing
Library Design & Construction
Custom or synthetic DARPin and ankyrin repeat libraries.
In Vitro Transcription & Translation
Generation of protein–ribosome–mRNA complexes under cell-free conditions
Target Selection
Iterative rounds of selection against client-supplied targets with increasing stringency
Sequence Recovery
RT-PCR amplification of selected mRNA, DNA sequencing and bioinformatic analysis
Expression & Characterization
Recombinant protein expression, Affinity and specificity testing
Why Ribosome Display?
Unlike cell-based display systems, ribosome display eliminates the need for transformation, allowing screening of libraries containing 10¹²–10¹⁴ unique variants. The direct linkage between the nascent protein, ribosome, and encoding mRNA enables efficient selection and rapid evolution of high-performance binders.
Key Advantages
- Ultra-large library diversity (10¹²–10¹⁴ variants)
- Completely cell-free selection
- Rapid affinity maturation through iterative selection
- Ideal for difficult or low-abundance targets
- Compatible with DARPins, ankyrin repeat proteins, antibody fragments, peptides, and engineered proteins
Applications
Our ribosome display platform supports:
- High-affinity DARPin discovery
- Ankyrin repeat protein engineering
- Affinity maturation
- Protein–protein interaction studies
- Diagnostic reagent development
- Therapeutic lead discovery
- Target validation and biomarker research
Analytical Characterization
Selected binders can be evaluated using:
ELISA
Surface Plasmon Resonance (SPR/Biacore)
Bio-Layer Interferometry (BLI)
Flow Cytometry (FACS)
DNA Sequencing
Functional & Cell-Based Assays
Rapid Discovery of High-Affinity Engineered Binding Proteins
Rx Biosciences delivers high-affinity DARPin and ankyrin binders through advanced ribosome display technology, enabling faster discovery of robust alternatives to conventional antibodies for research, diagnostics, and therapeutic development.