the PLATFORM.

Enzymes are our passion and innovation is our foundation.

Our chemoenzymatic platform designs, synthesizes, and screens covalent drug leads overnight.
At the heart of our platform is Selectase® – our proprietary enzyme family that transforms months of complex chemistry into hours, accelerating the discovery of next-generation medicines.

Customer Story.

From target to candidate in 12 weeks.

Start
Target
Whether your target has a resolved structure or not, we help generate high-quality drug candidates efficiently.
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Day 1
Hit ID
Screening the customized kezbio covalent fragment library to check for target engagement and to find hits.
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Days 2-7
Hit-to-Lead
Our integrated discovery platform combines rapid chemoenzymatic synthesis, experimental validation and AI-driven design in a continuous learning cycle — accelerating the progression to optimized lead compounds.
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Weeks 2-12
Lead Optimization
The process is supported by generative AI and the outcome molecules are filtered to have optimized drug properties.
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Week 12
Drug candidate
Validated candidate ready for development.
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How it works.

Building validated molecules with Intelligent Fragment Evolution (IFE).

FBDD
HTS
AI/ML
Start small,
grow smart
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FBDD explores chemical space with small, low-complexity fragments, sampling far more efficiently than large compound libraries and giving high-quality, ligand-efficient starting points. We screen our customized covalent fragment library against your target, then grow the most promising fragments step by step into potent, selective leads.

Variants in five hours
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Our chemoenzymatic platform makes screening a matter of hours. By pairing tailored substrates with selective enzymes, we generate large sets of structural variants in as little as five hours, entirely without chromatography, removing the slowest steps of classical medicinal chemistry and testing many more analogs per cycle.

Designs that learn
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Generative AI designs the next generation of molecules, optimizing candidates before any are made. The power lies in the tight loop with the lab: every compound we synthesize is measured, and those real experimental results become the ground truth that trains the models. With each cycle the algorithm sharpens and the path to a lead gets shorter.

Start small, grow smart
Read more

FBDD explores chemical space with small, low-complexity fragments, sampling far more efficiently than large compound libraries and giving high-quality, ligand-efficient starting points. We screen our customized covalent fragment library against your target, then grow the most promising fragments step by step into potent, selective leads.

Variants in five hours
Read more

Our chemoenzymatic platform makes screening a matter of hours. By pairing tailored substrates with selective enzymes, we generate large sets of structural variants in as little as five hours, entirely without chromatography, removing the slowest steps of classical medicinal chemistry and testing many more analogs per cycle.

Designs that learn
Read more

Generative AI designs the next generation of molecules, optimizing candidates before any are made. The power lies in the tight loop with the lab: every compound we synthesize is measured, and those real experimental results become the ground truth that trains the models. With each cycle the algorithm sharpens and the path to a lead gets shorter.

A UniQUE APPROACH TO DISCOVERY.

Stable scaffolds and new chemical entities for a wide range of targets.

01


Novelty

We enter new chemical space by connecting synthetic building blocks via biocatalysis. This generates protectable new drug candidates for you.

02


Diversity

Our Selectase® (polyketide synthases) and pharmaceutical biocatalysis create different molecular scaffolds. Hence, we can address a wide variety of targets.

03


Biocompatibility

Our molecules are created by carbon-carbon bond formation and merge natural polyketide functions with custom-made chemical functions. The result, stable scaffolds with appropriate solubility and balanced H-bond opportunities to your target.

Our platform delivers optimized molecules quickly.

04


Speed

Our platform designs, synthesizes, and screens covalent binders overnight. You are provided with custom molecules and data quicker than you pay the bill.

05


Selectivity

The Selectase® places each fragment where the target geometry demands it and defines the outcome. No chromatography needed for purification, meaning more variants to be tested for you.

06


Sustainability

Most of our reactions are performed in water and very little organic solvent is used in our processes, reducing impact on the environment.

We scale discovery with automated procedures.

07


Standardization

Every project follows a structured development plan with clearly defined milestones, timelines, and deliverables – providing transparency, predictability, and efficient execution from start to finish.

08


Automation

Everything is set up so that it can run automatically in a timely manner. We are currently increasing capacity for large-scale automation.

09


Scalability

Our proprietary Selectase® can be used within production hosts in bioreactors. As soon as your new drug candidate is found, we provide options for Selectase® to be used for API-scale production.

Building blocks

ready for synthesis

Enzymes need substrates. We have a growing library of high-quality Coenzyme-A-esters and KEZ®-esters ready-to-use in our ultra-low-temperature freezer.

Selectase® enzyme library

ready to use

We express and engineer our own polyketide synthase enzymes. The enzyme collection in our freezer is continuously expanded unlocking new molecular scaffolds.

Fragment library

ready for screening

We create a series of representative covalent fragments for every accessible molecular scaffold and attach validated electrophilic warheads.

Target engagement analysis

in-house

We combine more than 30 years of experience in enzyme analysis with in-house fluorometric assays and access to a trusted network of proteomics experts, providing comprehensive target validation.