Let biologists order any DNA they can design, including long, repetitive or GC-rich sequences that chemical synthesis can't make, in weeks rather than months, so designing biology is no longer bottlenecked by writing DNA.
Selling 50 kb sequence-perfect clonal DNA since Oct 2025, delivered in under 25 business days.
Updated 22 Oct 2025Checked 11 Oct0 updates this week
Each polymerase carries a single nucleotide on a linker; it adds that one letter, then is cut away, so the strand grows base by base.
Chemical synthesis uses acids that damage long strands; the enzymatic route keeps DNA intact, so fragments run far longer.
Long fragments are joined into full constructs and grown as clones in cells.
Every construct is sequenced end to end with long reads so customers get sequence-perfect DNA.
| Spec | Enzymatic long-DNA synthesis |
|---|---|
| Longest clonal construct | 50 kbR (reported) |
| Direct synthesis fragment | Up to 900 basesR (reported) |
| 50 kb delivery | Under 25 business days, guaranteedR (reported) |
| Price | From $0.28 per base pairR (reported) |
| Chemical synthesis constructs | Rarely above 10 kbR (reported) |
R reported by the company
Ansa Biotechnologies
Enzymatic DNA synthesis, long clonal DNA
Emeryville, California company that writes DNA with an enzyme instead of harsh chemistry, selling sequence-perfect DNA up to 50,000 bases long for gene therapy, antibody and synthetic-biology work.
