Fig. 1From: Serological determinants of COVID-19Spike protein of the SARS-CoV-2. a, b 3D structure of the Spike protein in the cleaved (a) or uncleaved (b) conformations (EMDB-11205, PDB 6ZGG or EMDB-11203, PDB 6ZGE respectively). Panel “a” also indicates Furin cleavage siteBack to article page