Main protease (Mpro, 3CLpro) of SARS-CoV-2 with an inhibitor in the active site. The enzyme cuts the viral polyprotein and is the target of antiviral protease inhibitors.

Scientifically accurate model built directly from the experimental atomic coordinates of Protein Data Bank entry 6LU7 (X-ray crystallography, 2.16 angstrom resolution), biological assembly 1. Source organism: Severe acute respiratory syndrome coronavirus 2. Only atoms that were resolved in the experiment are represented; nothing has been added or invented.

MODEL
- Molecular surface of every chain as a separate, named object (4 chains, 2 distinct components)
- 83,308 polygons, 83,312 vertices; all quads
- All surface meshes closed and manifold (no holes)
- One Principled BSDF material per component; no textures needed
- 1 unit = 1 nanometer; centred at the origin; objects grouped under one parent

FORMATS
- Blender 4.0 (.blend), native, with studio lighting and camera (Cycles)
- FBX (.fbx)
- OBJ (.obj + .mtl)
- glTF 2.0 binary (.glb)
- USD (.usdc)
- STL (.stl), geometry only

Structure reference: PDB 6LU7; Jin et al., Nature, 2020. PDB structure data are in the public domain (CC0 1.0).