Stag2-mediated chromatin dynamics regulates antibody class switch recombination - Zhichen Wan; Leyi Yu; Zifan Yang; Sha Luo; Yutao Zhou; Ruolin Qiao; Hailiang Zha; Xiaoling Shan; Yifan Wang; Shuchan Li; Xuefei Zhang (Proceedings of the National Academy of Sciences, 2026)