Mck1 defines a key S-phase checkpoint effector in response to various degrees of replication threats. - Li, Xiaoli; Jin, Xuejiao; Sharma, Sushma; Liu, Xiaojing; Zhang, Jiaxin; Niu, Yanling; Li, Jiani; Li, Zhen; Zhang, Jingjing; Cao, Qinhong; Hou, Wenya; Du, Li-Lin; et al. (PLoS Genetics, 2019)