Envelope glycoprotein trimer of HIV-1 (BG505 SOSIP), the only viral protein on the surface of the virus and the target of broadly neutralising antibodies and vaccine design.

Scientifically accurate model built directly from the experimental atomic coordinates of Protein Data Bank entry 4ZMJ (X-ray crystallography, 3.31 angstrom resolution), biological assembly 1. Source organism: Human immunodeficiency virus 1. 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 (6 chains, 2 distinct components)
- Surface glycans (sugar chains) as separate objects
- 107,142 polygons, 107,220 vertices; all quads
- All surface meshes closed and manifold (no holes)
- Identical subunits share mesh data (instances)
- 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 4ZMJ; Do Kwon et al., Nat.Struct.Mol.Biol., 2015. PDB structure data are in the public domain (CC0 1.0).