DNA-BFN: Bayesian Flow Networks for Generative Modeling of Regulatory DNA Sequences

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ID: 332909
2026
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Abstract
Abstract Motivation Designing regulatory DNA sequences is challenging due to their discrete nucleotide alphabet and complex higher-order dependencies underlying regulatory function. Many existing generative models, particularly diffusion-based approaches, learn by injecting stochastic noise into sequences and training denoising processes, which can distort discrete sequence structure and weaken biological constraints. Results Here, we introduce DNA Bayesian Flow Networks (DNA-BFN), a generative framework that models regulatory DNA sequences through iterative Bayesian updates of per-position nucleotide distributions. By directly modeling per-position categorical beliefs, DNA-BFN realizes a diffusion-like generative process without explicitly perturbing discrete nucleotide sequences, enabling fully differentiable training while preserving discrete sequence structure. Across eight regulatory sequence datasets spanning diverse species, scales, and sequence lengths, DNA-BFN consistently outperforms state-of-the-art baselines, faithfully preserves sequence feature statistics and regulatory patterns, enables few-shot sequence design, and achieves faster sampling efficiency. These results show that framing sequence generation as progressive uncertainty reduction in probability space provides an effective and generalizable approach for nucleotide sequence design. Availability The software and its source code are publicly available at https://github.com/WangLabTHU/DNA-BFN. The dataset, source code and model weights are available in the Zenodo repository: https://doi.org/10.5281/zenodo.20177972. Supplementary information Supplementary data are available at Bioinformatics online.
Reference Key
openalex_W7222944812 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Han Yu, Qixiu Du, Lei Wei, Xiaowo Wang
Journal BMC Bioinformatics
Year 2026
DOI
10.1093/bioinformatics/btag785
URL
https://doi.org/10.1093/bioinformatics/btag785
Keywords Keywords not found

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