Figure 3 from: Syahputra G, Gustini N, Bustanussalam B, Hapsari Y, Sari M, Ardiansyah A, Bayu A, Putra MY (2021) Molecular docking of secondary metabolites from Indonesian marine and terrestrial organisms targeting SARS-CoV-2 ACE-2, M pro, and PL pro receptors. Pharmacia 68(3): 533-560. https://doi.org/10.3897/pharmacia.68.e68432

Figure 3 Structure of the ACE 2 receptor h receptor (PDB ID: 1R42) along with the distribution of residues on the Ramachandran plot. The ACE-2 receptor structure is composed of 31 α-helix structures and six β-sheet structures. The structure of the hACE-2 receptor is ready to be used in molecular docking simulations with 98.37% of the residue in the protein-forming region.