Structure of the scaffolding protein and portal within the bacteriophage P22 procapsid provides insights into the self-assembly process. - Xiao, Hao; Chen, Wenyuan; Pang, Hao; Zheng, Jing; Wang, Li; Feng, Hao; Song, Jingdong; Cheng, Lingpeng; Liu, Hongrong (PLoS Biology, 2025)