dna tetrahedron origami nanostructure

dna tetrahedron origami helix pyramid biotechnology nucleotide nanotechnology engineering design folding technology science biochemistry biology chemistry scattered triangle shape tetrahedrite biological molecular structure toughness built three dimensional closeup genetic modification research conjugation process cut atom molecule assemble joined schematic strand robust scaffold chain mechanical background assembly nanostructure oligonucleotide nanoscience helical covalent tetrahedral double bioengineering isolated rigid atomic tetrahedra rendering close gene backgroun