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. Author manuscript; available in PMC: 2012 Oct 4.
Published in final edited form as: Nano Lett. 2005 Apr;5(4):661–665. doi: 10.1021/nl050084f

Figure 1.

Figure 1

Schematic Drawings of the Six-Helix Bundle Motif. (a) The strand sequences are shown for a version of this motif with 14 nucleotide pairs between crossovers. Points A and B are the places where the cyclic bundle closes. Strand numbering is indicated. There are six helical strands, shown in black, and the other strands perform the crossovers. (b) A cross-sectional geometrical view of a six helix bundle in which the helices are indicated by Roman numerals. (c) A geometrical side view of a six helix bundle in which the crossovers are separated by seven nucleotide pairs. The back and front are indicated as the ends to be used in self-assembly.