Building Custom DNA without Bacterial Constraints

Nov 4, 2026
A custom DNA strand on a lab bench with a pipette nearby.AI-generated from publicly available materials.

Ribbon Bio is revolutionizing DNA assembly by eliminating the reliance on bacterial hosts, addressing significant challenges faced by molecular biologists.

Traditionally, constructing custom DNA sequences involves inserting them into bacteria, a method that has been the cornerstone of molecular biology for decades. However, this approach is often slow, requires extensive infrastructure, and can fail with certain sequences that bacteria struggle to maintain. Ribbon Bio's innovative cell-free assembly technology offers a solution by bypassing bacterial involvement entirely, thus reducing issues related to contamination and sequence instability. This shift allows researchers to work with toxic or complex DNA sequences that would otherwise be problematic.

The process begins with Ribbon Bio's advanced software, which identifies potential issues within target sequences and prepares oligo pools accordingly. The company initially offered this as a service, MiroSynth, but has since developed the MiroMine kit, enabling customers to perform DNA assembly in-house. Early results indicate high accuracy rates for constructed molecules, with significant reductions in endotoxin levels and no residual bacterial DNA, enhancing the overall reliability of the process.

Flock Bio, an early adopter of the MiroMine kit, has reported substantial time savings in their DNA assembly workflow, allowing for rapid turnaround in projects like antibody discovery. The implications of this technology are profound, particularly for therapeutic development, where the need for endotoxin-free material is critical. By streamlining the assembly process, Ribbon Bio is poised to accelerate scientific research and innovation, allowing scientists to focus on their discoveries rather than the limitations of traditional methods.