miR-6388 regulates granulosa cell function in sheep by targeting GDF9 and modulating the TGF-β signaling pathway - Jianyu Xu; Yanyu Bai; Xinyue An; Suhe Alatan; Zhuer Gan; Zhana Naren; He Bu; Guifang Cao; Ming Cang; Bin Tong (Theriogenology, 2026)