Designing a Nanotube Using Naturally Occurring Protein Building Blocks
Figure 2
The Optimized Structure of the Diphenylalanine Nanotube
(A) The structure of two diphenylalanine peptides in a lattice. The carbon atom is colored yellow, oxygen in red, nitrogen in green, and hydrogen in blue.
(B) The nanotube constructed in 10 rounds with the optimized lattice constants (a = 6.8487, b = 8.7846, γ = 88.963). There are a total of 2,000 (100 × 10 × 2) diphenylalanine molecules in the constructed nanotube. The wall thickness of the tube is around 16 Å. The inner wall diameter of the tube is 202 Å and the outer wall diameter is 234 Å.