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Trusted by Leading Research & Pharma Institutions

Precision Mutant Libraries Service

Accelerate your protein engineering research with precisely crafted mutant libraries. Our silicon-based synthesis platform delivers near-complete variant coverage with NGS verification for every library, supporting directed evolution and functional protein optimization campaigns.

NGS Verified
~99% Coverage
100% Accurate
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Trusted by leading research and pharmaceutical institutions

Harvard
Pfizer
MIT
Roche
Stanford
Novartis

Why Choose Us

Near-complete variant coverage
Complete codon control
NGS verification included
Flexible library formats
99%
Variant Coverage
100%
Sequence Accuracy
20
AA Options per Position
1:2000
Error Rate
Overview Technology Specifications Workflow Applications FAQ
Service Overview

Comprehensive Precision Mutant Library Solutions

Our platform combines advanced silicon-based DNA synthesis with rigorous NGS verification to deliver precisely crafted mutant libraries for protein engineering and directed evolution.

Site Saturation Libraries

Precisely introduce all 20 amino acids at target positions with complete codon control. Unlike error-prone PCR approaches, our synthetic libraries achieve near-complete coverage without bias or unwanted stop codons.

  • Single or multiple position saturation
  • All 20 amino acids available at each position
  • No premature stop codons

Combinatorial Libraries

Systematically explore sequence space by mutating multiple positions simultaneously in precise ratios. Perfect for identifying synergistic mutations that enhance protein function.

  • Multi-position combinatorial mutagenesis
  • Customizable diversity ratios
  • Optimized for screening workflows

Complete Coverage

All 20 amino acids at target positions with optimized degenerate codons.

NGS Quality Control

Every library undergoes next-generation sequencing verification with detailed reports.

Flexible Library Types

From single-site saturation to complex combinatorial libraries.

Ready to Accelerate Your Protein Engineering?

Get a customized quote for your precision mutant library project.

Technology Platform

Silicon-Based Synthesis Platform

Our proprietary platform enables massively parallel oligonucleotide synthesis with industry-leading accuracy and uniformity.

Precision Synthesis

Silicon-based DNA synthesis platform enables high-fidelity oligos with error rates as low as 1:2,000 bp, far superior to traditional synthesis methods.

1:2,000 Error Rate High Fidelity

NGS Verification

Every library is validated by next-generation sequencing to confirm variant representation and uniformity before delivery.

Deep Sequencing Coverage Analysis

Complete Codon Control

Access all 64 codons with precise control over codon usage at each position, eliminating the bias inherent in PCR-based methods.

64 Codons No Bias

Quality Control

NGS Next-generation sequencing verification
MS Mass spectrometry confirmation
QC Uniformity verification per position
COA Certificate of Analysis included

Delivery Options

Pool Fully pooled library DNA
Per-Position Oligos grouped by position
Array Individual variants on array
Clone Pre-cloned into vector
Specifications

Library Specifications

Comprehensive options to meet your protein engineering requirements.

Parameter Site Saturation Combinatorial Custom Library
Positions 1-10 per library 2-5 simultaneous User defined
AA per Position All 20 or subset Customizable User defined
Variant Coverage ~99% >96% NGS verified
Error Rate 1:2,000 bp 1:2,000 bp 1:2,000 bp
Gene Length Up to 10 kb Up to 10 kb Up to 10 kb
Delivery Format Pool, per-position, array Pool or cloned Custom
Workflow

Streamlined Process from Design to Delivery

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

1

Consultation

Discuss your targets and design strategy

2

Design

Position selection and codon optimization

3

Synthesis

Silicon-based oligo synthesis

4

NGS QC

Sequencing verification of coverage

5

Delivery

Secure packaging with QC report

Applications

Diverse Applications Across Biotechnology

Our precision mutant libraries support research and development in multiple fields.

Directed Evolution

Systematically explore sequence space to identify beneficial mutations. Our precisely crafted libraries eliminate the coverage limitations of error-prone PCR, ensuring you don't miss promising variants hidden by uneven mutagenesis.

  • Complete variant representation
  • No unwanted stop codons
  • Multi-round evolution support
  • Phage, yeast, or bacterial display
96%
Variant coverage vs 35% for epPCR

Protein Engineering

Engineer proteins with enhanced stability, activity, or specificity. Our libraries enable precise interrogation of functional residues, supporting structure-activity relationship studies and rational design validation.

  • Active site optimization
  • Thermostability engineering
  • Binding affinity maturation
  • Substrate specificity tuning
20
Amino acids at each position

Therapeutic Development

Accelerate biopharmaceutical development with precisely engineered proteins. Our libraries support the systematic optimization of therapeutic candidates, from enzyme replacement therapies to novel biologics.

  • Immunogenicity reduction
  • Half-life extension
  • Fc engineering
  • Enzyme therapeutics
GMP
Quality standards available
Testimonials

What Our Clients Say

Trusted by researchers worldwide for quality and reliability.

"The variant coverage exceeded our expectations. Unlike our previous epPCR approach, we found beneficial mutations at every position tested. A game-changer for our enzyme evolution project."

S
Senior Scientist
Biotechnology Company

"The NGS verification gave us confidence that our library truly represented all variants. The detailed QC report saved us significant validation time. Highly recommended for serious protein engineers."

J
Research Director
Academic Research Institution

"We used the combinatorial library service for our antibody affinity maturation project. The precise control over mutation combinations helped us identify synergistic hits we would have missed with traditional approaches."

M
Lead Researcher
Pharmaceutical Company
Scientific Literature

Scientific Foundation

Our platform is backed by peer-reviewed research.

45 Citations

High-throughput screening, next generation sequencing and machine learning: advanced methods in enzyme engineering

P. Sevajees, A. M. K. Hussain, S. S. Nawar, et al. PMC. 2022.

Comprehensive review of deep mutational scanning and DMS technologies for enzyme engineering, including site saturation mutagenesis methods.

View DOI
28 Citations

Global Analysis of Multi-Mutants to Improve Protein Function

Kristoffer E. Johansson, Kresten Lindorff-Larsen, Jakob R. Winther. Journal of Molecular Biology. 2023.

GMMA analysis of 54,000+ GFP variants demonstrates value of combinatorial mutant libraries for identifying synergistic beneficial mutations.

View DOI
35 Citations

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

Yang Jason, Julie Ducharme, Kadina E. Johnston, et al. ACS Synthetic Biology. 2023.

Method for optimizing degenerate codon libraries to balance variant diversity and functional fitness for ML-assisted protein engineering.

View DOI
52 Citations

Split & mix assembly of DNA libraries for ultrahigh throughput on-bead screening of functional proteins (SpliMLiB)

Anonymous. Nucleic Acids Research. 2020.

Novel method achieving 160,000-member library with 99.3% coverage, enabling ultra-high throughput functional protein screening.

View DOI
12 Citations

Cell-Free Protein Synthesis as a Method to Rapidly Screen Machine Learning-Generated Protease Variants

Anonymous. ACS Synthetic Biology. 2025.

Demonstrates rapid screening of 48 variants in 6 hours using CFPS, accelerating the mutant library screening workflow.

View DOI
FAQ

Frequently Asked Questions

Find answers to common questions about our service.

Site saturation libraries mutate a single amino acid position to all 20 possible amino acids, allowing you to identify the best substitution at that position. Combinatorial libraries mutate multiple positions simultaneously, enabling discovery of synergistic mutations that improve function when combined. Both approaches provide complete coverage that error-prone PCR cannot achieve.
Unlike PCR-based methods that introduce mutations randomly and incompletely, our silicon-based synthesis platform produces each variant as an individual oligonucleotide with precise sequence control. Every library undergoes NGS verification to confirm variant representation before delivery, with detailed coverage reports provided for each position.
We offer flexible delivery options: pooled library DNA (all variants mixed), per-position grouping (variants at each position separated), individual array format (each variant isolated), or pre-cloned into your vector of choice. The optimal format depends on your downstream screening workflow.
Error-prone PCR typically achieves only 35% variant coverage due to codon bias and single-base mutation limitations. Our synthetic libraries achieve ~99% coverage with complete codon control. Studies have shown synthetic saturation variant libraries identify significantly more beneficial mutations than epPCR-generated libraries in the same screening assay.
Yes, our platform handles challenging sequences including those with high GC content, repetitive regions, or membrane protein targets. We offer codon optimization services to improve expression while maintaining your desired mutation positions. Our team will consult on design considerations for specialized applications.
Every library delivery includes comprehensive QC documentation: NGS sequencing data with coverage statistics for each position, mass spectrometry verification of representative variants, uniformity analysis showing balanced representation, and a Certificate of Analysis documenting all quality metrics. This documentation supports both research and regulatory requirements.

Ready to Start Your Project?

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

No obligation
24h response
Expert consultation

Recommended Services

· Gateway Cloning Service
· Randomized Mutant Libraries Service
· Site-Directed Mutagenesis Libraries
· Scanning Point Mutation Libraries
· Degenerated Mutagenesis Libraries Service
· DNA vector construction service

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