This HIV virion is featured in the PathogenAR HIV: Antiretroviral Drugs module. 

The .fbx version has an organized hierarchy of mapped components and was the version used to create the application.  THIS IS NOT 3D PRINTABLE

The other versions were required for upload to 3D Print Exchange and SHOULD NOT BE 3D PRINTED without significant modification.

A similar model that is 3D Printable can be found here: https://3dprint.nih.gov/discover/3dpx-003873