# Ansa launches 50 kb sequence-perfect clonal DNA, the longest synthetic DNA sold commercially

Canonical page: https://technooptimist.io/stories/ansa-launches-50-kb-sequence-perfect-clonal-dna-the-longest-synthetic-7b6568a2
Date: 22 Oct 2025
About: [Ansa Biotechnologies](https://technooptimist.io/companies/ansa-biotechnologies.md) · [Enzymatic long-DNA synthesis](https://technooptimist.io/biotech/enzymatic-dna-synthesis.md)
Original source: https://www.drugdiscoverynews.com/ansa-biotechnologies-redefines-what-s-possible-in-dna-synthesis-with-50-kb-sequence-perfect-clonal-product-16751

After an early-access programme with more than 20 institutions, Ansa launched clonal DNA constructs up to 50,000 bases, verified by long-read sequencing and delivered in under 25 business days. Constructs made by conventional chemical synthesis rarely exceed 10 kb, so whole gene circuits, large gene-therapy payloads and complex vectors can now be ordered rather than built by hand.

## Key facts

- Price from $0.28 per base pair, falling with length.
- Early users include the Allen Institute's Seattle Hub for Synthetic Biology and Applied StemCell.
- Covered by Ansa's on-time guarantee.

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