Hu, L., Qin, H., Zhang, Y., Lu, Y., Qiu, P., Guo, Z., Cao, L., Jiang, W., Shen, Y., Chen, Q., Shang, Y., Xia, T., Deng, Z., Xu, X., Zhao, H., Fang, S., Li, Y., Zhang, Y. (2026). RegFormer: a single-cell foundation model powered by gene regulatory hierarchies. Nature Communications. https://doi.org/10.1038/s41467-026-72198-x