Mapping the mutational landscape of an avian retrovirus envelope protein across its evolutionary trajectory. - Xu, Moru; Liu, Yupeng; Lan, Xin; Wang, Zhenyu; Qian, Kun; Shao, Hongxia; Huang, Jinlin; Ye, Jianqiang; Qin, Aijian (PLoS Pathogens, 2026)