This is a basic DNA Model created in Lightwave 3D. Key items need support (phosphates, sugars, and hydrogen bond). The main, DNA model, does not. (Update) It was brought to my attention that the spiral was rotating in the wrong direction so, I uploaded a mirrored version.
dna_fixed_rotation.stl | 1.8MB | |
key_items_dna.stl | 80.2KB |