Amino acid residues 655 and 969 in the spike protein of Omicron subvariant BA.1 control use of TMPRSS2 versus Cathepsin L dependent entry pathways and cell tropism - Cheila Rocha; Prerna Arora; Lu Zhang; Anzhalika Sidarovich; Luise Graichen; Anna-Sophie Moldenhauer; Stefan Pöhlmann; Markus Hoffmann (PLoS ONE, 2025)