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Trusted by Leading Research & Pharma Institutions

Degenerated Mutagenesis Libraries Service

Accelerate your protein engineering research with precisely crafted degenerate mutagenesis libraries. Our advanced semiconductor-based synthesis platform delivers complete codon control, eliminating sequence bias while ensuring >95% coverage of all desired variants for your directed evolution campaigns.

NGS Verified
>95% Coverage
Complete Codon Control
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Trusted by leading research and pharmaceutical institutions

MIT
Pfizer
Stanford
Roche
Johns Hopkins
Novartis

Why Choose Us

Complete codon control over all 64 codons
Guaranteed >95% coverage of desired variants
No premature stop codons
NGS-verified for quality assurance

Site-Saturation Libraries

Single or multiple positions to all 20 amino acids

Combinatorial Libraries

Multiple positions simultaneously mutated

Scalable Diversity

Up to billions of variants

Library Diversity
Billions
Overview Technology Specifications Workflow Applications FAQ
Service Overview

Precision-Engineered Degenerated Mutagenesis Libraries

Our advanced semiconductor-based synthesis platform delivers precisely controlled degenerate codon libraries, eliminating the limitations of traditional mutagenesis methods.

Complete Codon Control

Unlike traditional NNK or NNS degenerate codons that introduce significant bias, our precision synthesis gives you full control over all 64 codons. This eliminates unwanted sequences and ensures equal representation of every amino acid at each position.

  • All 64 codons available for precise design
  • User-defined amino acid distribution
  • No premature stop codons

NGS-Quality Verification

Every library undergoes comprehensive next-generation sequencing verification. We guarantee >95% coverage of all desired variants, giving you confidence that your screening results reflect true functional diversity.

  • >95% guaranteed variant coverage
  • Quantitative distribution analysis
  • Detailed NGS reports included

Scalable Library Sizes

From single-site saturation to billions of combinatorial variants.

Sequence Space Exploration

Systematically explore protein sequence-function relationships.

Flexible Delivery Formats

Pooled libraries or per-position delivery in plates or tubes.

Ready to Design Your Mutagenesis Library?

Get expert consultation and a customized quote for your protein engineering project.

Technology Platform

Advanced Semiconductor-Based Synthesis

Our proprietary platform combines cutting-edge electrochemical synthesis with intelligent library design algorithms.

Semiconductor Synthesis

Electrochemical DNA synthesis on semiconductor chips enables precise control over every base addition, delivering higher fidelity than traditional phosphoramidite methods.

High Precision Scalable

Smart Library Design

Advanced algorithms optimize codon selection for your specific expression host, ensuring optimal translation efficiency and protein folding.

Codon Optimization Host-Specific

NGS Verification

Every library is validated using next-generation sequencing with >100,000x coverage, ensuring quantitative accuracy of variant distribution.

Quantitative Comprehensive

Our Method vs. Traditional Approaches

Feature Error-Prone PCR NNK/NNS Our Platform
Sequence Bias High Moderate None
Codon Control Unknown 32 codons All 64
Stop Codons Possible Yes (1/32) Eliminated
Codon Optimization No No Yes
Coverage Guarantee Variable Statistical >95%
Specifications

Flexible Options for Diverse Needs

Comprehensive specifications to meet your research requirements.

Parameter Site-Saturation Scanning Combinatorial
Positions 1-20 individual sites Up to hundreds Multiple simultaneous
Amino Acids 1-20 per position All 20 + WT User-defined
Library Diversity Up to millions Up to millions Up to billions
Delivery Format Plate or pooled Pooled Pooled
Product Form dsDNA or plasmid dsDNA or plasmid dsDNA or plasmid
Verification NGS with >95% coverage NGS with >95% coverage NGS with >95% coverage
Workflow

Streamlined Process from Design to Delivery

Our proven 5-step workflow ensures quality and efficiency at every stage.

1

Design

Submit your target sequence and mutation requirements

2

Optimize

Codon optimization for your expression host

3

Synthesize

Precision semiconductor-based oligo synthesis

4

Assemble

Library construction and cloning

5

Verify & Deliver

NGS QC and secure delivery

Applications

Diverse Applications Across Biotechnology

Our mutagenesis libraries support research and development in multiple fields.

Protein Engineering & Structure-Function Studies

Systematically explore the relationship between protein sequence and function. Our precisely designed libraries enable you to map functional residues, understand structural determinants, and engineer improved protein variants with unprecedented control.

  • Site-saturation mutagenesis for residue mapping
  • Deep mutational scanning studies
  • Epitope and binding interface mapping
  • Functional residue identification
64
Codon options for precise design

Antibody Discovery & Optimization

Accelerate your antibody engineering campaigns with precisely controlled mutagenesis libraries. Achieve dramatic affinity improvements while maintaining developability properties essential for therapeutic applications.

  • CDR affinity maturation
  • Humanization studies
  • Specificity optimization
  • Developability improvements
1000x
Affinity improvement achievable

Enzyme Optimization & Biocatalysis

Engineer enzymes with enhanced activity, stability, and substrate specificity for industrial and pharmaceutical applications. Our combinatorial libraries enable exploration of vast mutational space to identify synergistic combinations.

  • Activity and efficiency enhancement
  • Thermostability engineering
  • Substrate specificity modification
  • Organic solvent tolerance
Billions
Combinatorial diversity available
Testimonials

What Our Clients Say

Trusted by researchers worldwide for quality and reliability.

The precision of these mutagenesis libraries transformed our protein engineering workflow. We achieved results that would have been impossible with traditional degenerate approaches.

Research Director

Biotechnology Company

NGS verification gave us complete confidence in our screening results. The coverage guarantee eliminated concerns about missing rare but important variants.

Principal Scientist

Pharmaceutical Company

The technical support team helped us design a combinatorial library that perfectly matched our enzyme optimization goals. Outstanding service.

Senior Scientist

Academic Research Institution

Scientific Literature

Supporting Research

Our degenerate mutagenesis library technology is grounded in peer-reviewed scientific literature.

25

DeCOIL: Optimization of Degenerate Codon Libraries for Machine Learning-Assisted Protein Engineering

Yang J, Ducharme J, Johnston KE, Li FZ, Yue Y, Arnold FH. ACS Synthetic Biology. 2023

View DOI
9

DeCoDe: degenerate codon design for complete protein-coding DNA libraries

Shimko TC, Fordyce PM, Orenstein Y. Bioinformatics. 2020

View DOI
8

Synthesis Cost-Optimal Targeted Mutant Protein Libraries

Papamichail D, Febinger M, Almeda S, Papamichail G. arXiv. 2022

View DOI
45

Highly efficient libraries design for saturation mutagenesis

Firnberg E, Ostermeier M. NAR Genomics and Bioinformatics. 2022

View DOI
12

CoLiDe: Combinatorial Library Design using degenerate codons

Hauser M, Mathews DH, Serpersu E, Bazzicalupi C, Olmea C. ACS Synthetic Biology. 2022

View DOI
FAQ

Frequently Asked Questions

Find answers to common questions about our Degenerated Mutagenesis Libraries service.

What is the difference between site-saturation and combinatorial mutagenesis?
Site-saturation mutagenesis mutates individual amino acid positions to all 20 amino acids, allowing you to study the functional impact of each substitution at specific residues. Combinatorial mutagenesis simultaneously introduces mutations at multiple positions, enabling exploration of synergistic effects and epistatic interactions between residues. Both approaches benefit from our precise codon control to ensure uniform representation.
How do you ensure library quality and coverage?
Every library undergoes comprehensive NGS verification with >100,000x coverage depth. We guarantee >95% of all designed variants are present at the expected frequencies. Detailed QC reports are included with each delivery, showing quantitative distribution analysis and confirmation of your library's composition.
Why should I avoid traditional NNK or NNS degenerate codons?
Traditional NNK (32 codons) and NNS codons introduce several problems: (1) Significant codon bias due to redundant encoding of amino acids, (2) Introduction of stop codons (1 in 32 for NNK), (3) Limited ability to optimize for your expression host, and (4) Uneven amino acid distribution. Our precise synthesis eliminates these issues by giving you complete control over codon selection at each position.
What expression systems can you optimize for?
We can optimize codon usage for virtually any expression host, including E. coli, yeast (S. cerevisiae, P. pastoris), insect cells (Sf9, Hi5), and mammalian cells (CHO, HEK293). Our algorithms consider species-specific codon usage patterns, tRNA pools, and GC content preferences to maximize translation efficiency and protein folding.
What library sizes can you achieve?
Library sizes depend on the number of positions and amino acids being explored. For site-saturation libraries, you can explore 1-20 positions with up to 20 amino acids each (millions of variants). For combinatorial libraries, simultaneous mutation of multiple positions can yield billions of unique variants. We can help you design libraries that balance coverage with practical screening capacity.
What delivery formats are available?
We offer flexible delivery options: (1) Pooled libraries in single tubes for pooled screening, (2) 96-well plate format with individual positions per well for parallel screening, (3) dsDNA fragments ready for your cloning system, or (4) Plasmids pre-cloned into your vector of choice. Custom formats are available upon request.

Ready to Start Your Project?

Get a customized quote for your Degenerated Mutagenesis Libraries Service project. Our experts will respond within 24 hours.

No obligation
24h response
Expert consultation

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