SARS-CoV-2 point mutations are over-represented in terminal loops of RNA stem-loop structures that can be resolved by Nsp13 helicase in a unique manner with respect to nucleotide dependence. - Dumm AJ; Zheng AY; Butler TJ; Kulikowicz T; George JC; Bombard PT; Sommers JA; Ding J; Brosh RM Jr (Nucleic acids research, 2025)