Fig. 1
From: Insights of Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV-2) pandemic: a current review
a The crystal structure of SARS-CoV-2 spike protein. The human ACE-2 receptor binding domain of spike protein is shown in red color (PDB ID: 6VSB) (b) 3D structure of SARS-CoV-2 main protease. Residues in the active site (His-41, Gly-143, Phe-140, and Glu-166) are shown in red color (PDB ID: 6 LU7) obtained from protein data bank (http://www.rcsb.org/pdb/)