Extended Data Fig. 1: Purification of the SARS-CoV-2 RBD–ACE2 complex.
From: Structure of the SARS-CoV-2 spike receptor-binding domain bound to the ACE2 receptor
a, Gel filtration chromatography of the complex. 1, SARS-CoV-2 RBD dimer–ACE2; 2, SARS-CoV-2 RBD monomer–ACE2; 3, SARS-CoV-2 RBD monomer. b, SDS–PAGE gel of the complex.
