Reference: Transient and stabilized complexes of Nsp7, Nsp8, and Nsp12 in SARS-CoV-2 replication by Mateusz Wilamowski, Michal Hammel, Wellington Leite, Qiu Zhang, Youngchang Kim, Kevin L. Weiss, Robert Jedrzejczak, Daniel J. Rosenberg, Yichong Fan, Jacek Wower, Jan C. Bierma, Altaf H. Sarker, Sus