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Trusted by Leading Research & Pharma Institutions

Site-Directed Mutagenesis Libraries

Accelerate your protein engineering research with custom mutagenesis libraries consistently manufactured to your exact specifications. From single-site saturation to combinatorial variant libraries, we deliver comprehensive solutions backed by deep mutational scanning expertise and industry-leading quality control.

100% Verified
Complete Coverage
High Uniformity
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Trusted by leading research and pharmaceutical institutions

MIT
Pfizer
Stanford
Roche
Johns Hopkins
Merck

Why Choose Us

100% Sanger or NGS verified
Complete 20 amino acid coverage
All mutation types supported
High uniformity across library

Library Types

Single-site
Saturation Library
Multi-site
Combinatorial Library
Scanning
Alanine & Positional
Custom
Tailored Design
20
AA options
100%
Accuracy
NGS
Verified
Overview Technology Specifications Workflow Applications FAQ
Service Overview

Comprehensive Site-Directed Mutagenesis Library Solutions

Our platform combines advanced PCR-based mutagenesis with high-throughput cloning to deliver precisely designed variant libraries for protein engineering and functional genomics research.

Saturation Mutagenesis

Generate comprehensive single-site saturation libraries covering all 20 amino acids at each target position. Our optimized NNK/NNS degenerate codon strategy ensures balanced library representation with minimal bias. Every position receives complete coverage for discovery research.

  • Complete 19-codon coverage per position
  • Optimized degenerate codon design
  • NGS-verified library uniformity

Combinatorial Libraries

Explore multi-site combinatorial mutation space efficiently. Our high-throughput platform generates diverse variant panels combining mutations across multiple positions, enabling discovery of synergistic effects and epistatic interactions that single-site approaches cannot capture.

  • Multi-position combinatorial design
  • Flexible variant counts
  • Arrayed or pooled delivery formats

Complete Coverage

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

NGS Quality Control

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

Flexible Library Types

From single-site saturation to complex combinatorial libraries, tailored to your research goals.

Ready to Build Your Variant Library?

Get a customized quote for your site-directed mutagenesis project.

Technology Platform

Advanced Mutagenesis Technologies

Industry-leading mutagenesis platforms ensuring high-quality variant libraries for every project.

High-Fidelity PCR

Proprietary high-fidelity polymerase blend minimizes second-site errors during mutagenesis. Our optimized protocols ensure maximum mutation incorporation efficiency while preserving plasmid integrity.

High Fidelity Low Error Rate

NGS Verification

Every mutagenesis library undergoes comprehensive NGS quality control to verify variant coverage, mutation accuracy, and library uniformity. Detailed QC reports document every clone.

Illumina Sequencing Coverage Reports

Gibson Assembly

High-efficiency Gibson assembly connects mutagenic fragments with near-perfect accuracy. This seamless, scarless cloning approach accommodates complex multi-fragment assemblies and large inserts.

Scarless High Efficiency

Quality Control

Sanger Individual clone verification
NGS Library coverage quantification
QC Complete QC report included
COA Certificate of Analysis

Library Delivery Formats

Pool Plasmid pool delivery
Array Individual clones in 96-well plates
Glycerol Glycerol stocks available
Custom Tailored to your specifications
Specifications

Flexible Options for Diverse Research Needs

Comprehensive specifications to meet your specific research requirements.

Parameter Single-Site Saturation Multi-Site Library Custom Design
Mutation Types Point, Insertion, Deletion Combinatorial multi-position Fully tailored
Positions per Library 1 to dozens 2 to 10+ simultaneous As specified
Variants per Position Up to 20 AA variants Flexible combinatorial User-defined
Plasmid Size Up to 12 kb Up to 12 kb Up to 15 kb
Verification Sanger + NGS QC Sanger + NGS QC Custom QC plan
Delivery Format Plasmid pool or arrayed Plasmid pool or arrayed As required
Workflow

Streamlined Process from Design to Delivery

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

1

Consultation

Share your target protein and mutation positions

2

Design

Codon optimization and library design

3

Mutagenesis

High-fidelity PCR and assembly

4

QC

NGS verification and validation

5

Delivery

Secure packaging with comprehensive report

Applications

Diverse Applications Across Protein Engineering

Our mutagenesis library services support research and development in multiple fields.

Protein Engineering & Directed Evolution

Saturation mutagenesis libraries are foundational tools for enzyme optimization and protein engineering. By systematically exploring sequence space, researchers can identify beneficial mutations that improve catalytic activity, thermostability, substrate specificity, or other properties of interest.

  • Enzyme thermostability improvement
  • Catalytic activity optimization
  • Substrate specificity engineering
  • Antibody affinity maturation
20x
Amino acid diversity per position

Drug Discovery & Therapeutic Development

Variant libraries enable systematic interrogation of drug targets and resistance mechanisms. From hotspot mapping to therapeutic protein optimization, mutagenesis libraries accelerate the discovery of clinically relevant variants and guide rational drug design.

  • Drug resistance mutation profiling
  • Therapeutic protein optimization
  • Epitope mapping for vaccine design
  • VUS (Variant of Unknown Significance) classification
100%
Variant verification accuracy

Functional Genomics & Structure-Function

Systematic mutagenesis libraries provide atomic-level insights into protein function and mechanism. When coupled with high-throughput screening or selection assays, these libraries generate comprehensive variant effect maps that illuminate sequence-function relationships.

  • Deep mutational scanning (DMS)
  • Active site and binding pocket mapping
  • Protein-protein interaction interfaces
  • Nucleotide-resolution variant effect mapping
NGS
Complete variant coverage data
Testimonials

What Our Clients Say

Trusted by researchers worldwide for quality and reliability.

"The saturation mutagenesis library we ordered exceeded our expectations. Complete coverage at each position and excellent uniformity. The NGS QC data gave us confidence to proceed directly to functional screening."

S
Principal Scientist
Biotechnology Company

"We used their mutagenesis library service for our enzyme optimization project. The comprehensive variant panel and detailed QC report made it easy to identify the best performers. Professional service from start to finish."

R
Research Director
Academic Research Institution

"The combinatorial library service helped us explore synergistic mutations across three positions simultaneously. We identified combinations that would have taken months to construct individually. A real time-saver for our drug discovery program."

L
Lead Researcher
Pharmaceutical Company
Scientific Literature

Scientific Foundation

Our platform is backed by peer-reviewed research in mutagenesis and protein engineering.

180 Citations

An efficient one-step site-directed and site-saturation mutagenesis protocol

Zheng W, Zhou CX, He ZM, et al. BMC Molecular Biology. 2010.

Developed a modified primer design method based on the QuickChange protocol that significantly improves PCR amplification efficiency for single and multiple site-directed mutations, extending to site-saturation mutagenesis with randomized codons.

View DOI
30 Citations

DIMPLE: deep insertion, deletion, and missense mutation libraries for exploring protein variation

Lee HW, Kim SGR, Lee JM, et al. Genome Biology. 2023.

Developed DIMPLE, a low-cost and low-bias method for systematically generating deletions, insertions, and missense mutations in genes using OLS synthesis and Golden Gate cloning, improving library quality over traditional methods.

View DOI
45 Citations

High-throughput Site-directed Scanning Mutagenesis Using a Two-fragment PCR Approach

Heydenreich FM, Miljuš T, Milić D, Veprintsev SM. Journal of Molecular Biology. 2021.

Established a high-throughput mutagenesis protocol based on a two-fragment PCR approach enabling efficient production of 400 single-point mutation libraries with complete coverage, with free software for primer design and sequencing analysis.

View DOI
20 Citations

satmut_utils: a simulation and variant calling package for multiplexed assays of variant effect

Campagne S, et al. Genome Biology. 2023.

Developed a standardized simulation and variant calling package for MAVE analysis, enabling scalable saturation mutagenesis data processing with superior performance benchmarks over existing tools.

View DOI
50 Citations

Deep mutational scanning of proteins in mammalian cells

D.T.B.R.课题组. Methods (Elsevier). 2023.

Comprehensive review of deep mutational scanning methods in mammalian cells, covering exogenous DMS and CRISPR-based approaches, with detailed protocols for library construction, screening systems, and NGS data analysis.

View DOI
FAQ

Frequently Asked Questions

Find answers to common questions about our mutagenesis library service.

We offer single-site saturation libraries (covering all 20 amino acids at each target position), multi-site combinatorial libraries, scanning mutagenesis (alanine scanning, positional scanning), and fully custom library designs. Our platform supports point mutations, insertions, deletions, and complex combinatorial variants across plasmids up to 15 kb.
Every library undergoes comprehensive NGS quality control to verify variant coverage, mutation accuracy, and representation uniformity. We use optimized NNK/NNS degenerate codons to minimize amino acid bias. Detailed QC reports document coverage statistics for every clone, ensuring you receive a library that faithfully represents the intended diversity.
We provide both Sanger sequencing for individual clone verification and NGS for comprehensive library QC. Each order includes a Certificate of Analysis documenting verification results. For combinatorial libraries, we verify representative clones by Sanger sequencing and quantify overall library composition by NGS.
We offer flexible delivery formats including plasmid pool delivery (for pooled screening), arrayed delivery in 96-well plates (for individual pick-and-screen), and glycerol stocks. Custom packaging formats are available upon request. All deliveries include freeze-dried plasmid DNA with detailed QC reports.
Provide your target plasmid sequence (including vector backbone), the specific mutation positions or regions to mutagenize, desired mutation types (substitution, insertion, deletion), delivery format preference, and any screening or selection system context. Our technical team will assist with codon design and library strategy optimization.
Yes. Our high-throughput platform is designed for large-scale combinatorial mutagenesis projects. We support simultaneous mutagenesis across multiple positions with flexible variant counts. Arrayed delivery in 96-well format is available for high-throughput screening workflows, and our team has experience supporting deep mutational scanning projects.

Ready to Start Your Project?

Get a customized quote for your Site-Directed Mutagenesis Libraries project. Our experts will respond within 24 hours.

No obligation
24h response
Expert consultation

Recommended Services

· DNA vector construction service
· Golden Gate Assembly Service
· Randomized Mutant Libraries Service
· Scanning Point Mutation Libraries
· Degenerated Mutagenesis Libraries Service
· Gateway Cloning Service

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