Example lattices constructed around intermediate C α coordinates. Lattices constructed in 2-D. The black vertices (v0,j, v0,j+1, v0,j+2) are the first approximations for the jth, (j+1)th, and (j+2)th points. Each black vertex has a lattice constructed around it. Directed edges from a vertex vi,j to all vertices in lattice (j+1) are also shown.