Different lysine-to-methionine ratios in a low-protein diet affect the microbiome and metabolome, influencing the jejunal barrier function in Tibetan sheep - Zhang, Fengshuo; Wu, Zhenling; Zhang, Yu; Su, Quyangangmao; Zhu, Kaina; Chen, Xuan; Hou, Shengzhen; Gui, Linsheng (Frontiers in Microbiology, 2025)